expert reply by: Adam R. ... there is also a small chance that the underhood fuse box fuse 26 .. that is labeled trailer tow park lamps.. and that is a 30 amp fuse. It is possible that one of the bulbs on your trailer burned out. Remove the lens, replace the bulb and check it. In most cases, it can be installed in about two hours. For the truck equipped with the package: Fuse F31 will be for the parking lights on the trailer connector and Fuse F58 is for the trailer connector backup lights. If all the lights appear dim or you have no lights at … Troubleshooting. At an auto parts store, buy a spool of 16-gauge wire for the individual ground wires. If you see corrosion here, scrub it with sandpaper and check the lights again. Are there relays that I am missing? Left turn, right turn, and brake lights all work. The utility trailer light kit we used (Blazer International No. Hooray! The problem with crimp-only terminals is they tend to have a weak connection even though they might feel quite tight. Test all of the lights, from the backup lights to the turn signals and brake lights to ensure the problem is not the tow vehicle itself. Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003 Checked plug end and wires before plug and they have no power. Check your vehicle's plug configuration. Trailer, semitrailer, or pole trailer with a gross weight of 3,000 lbs. In this case, make sure you don’t have a blown fuse by checking that all of your tow vehicle lights are actually working. My turn signals work just not the running light. Installation won't take more than a few hours to complete. All items stopped working at the same time. The best way to troubleshoot your trailer lighting problem is to unplug the trailer from the tow vehicle and test each one individually. Next, check the ground wire. The same thing happened, trailer lights are on all the time, Called the dealer and told them again it was with the Forester wiring and not the trailer. If after you check the tow vehicle for problems the trailer lights still appear dim or aren't lighting at all, clean the connector plug. At an auto parts store, buy a spool of 16-gauge wire for the individual ground wires. I fixed it - all lights are fully working now. Check to see if the vehicle ground wire is stacked with additional wires on a screw. At a bare minimum, the last several feet of corroded wire should be replaced. Vehicles fitted with aftermarket towbars usually are not fitted with these plug-in systems. I have installed a brand new light kit with harness on my boat trailer back about 6 months ago. dowel to get into tight spaces. Its a basic 4 prong connection. Anyhow I have wondered ever since I first plugged in my boat trailer, why the running lights (tail lights) are always On, all the time as soon as the plug is inserted. It also might be possible that several wires are connected to improper connection points. i hooked up another truck to my trailer and the trailer worked fine. Check the necessary things. This means that using several functions at the same time creates the load that a weak ground can’t handle. Each component should have its own ground to the frame of the trailer. Always remember, there must be some form of light or reflective surface on a trailer … Make sure both the trailer and tow vehicle harness is securely plugged in. but not running lights. If the vehicle's lighting system functions as designed, grab a trailer wiring tester to check the tow vehicle socket. I was once told by an old time to not rely on my auto lights and to turn the lights on manually. If all the lights appear dim or you have no lights at all, check the trailer  light harness at the tow vehicle. If the trailer lights function with such a setup, it is clear the issue is with the tow vehicle. Arjuna George (arjunageorge) Jamie Holmes (jholmes4) Ken Akerman (kenakerman) Chunsberger (chunsberger) Actions. It does not allow for a voltage drop through the connection. If the ground screw itself is corroded, replace it with a new screw. Why are my lights not working? Start at the tow vehicle. Trailer wiring kits are surprisingly affordable. Trailer, semitrailer, pole trailer, or vehicle drawn by another vehicle must be equipped with at least 1 tail lamp on rear that emits red light from a distance of 500 feet and the lamp height must be no more than 60 inches but not less than 20 inches. If you are using traditional bulbs, always carry a couple of spares too. Ground problems are the top cause of issues with trailer wiring. Attach a bit of 220-grit sandpaper to the butt end of a 3/8-in.dowel with hot glue. The lights on the box trailer worked fine the other day but I tried the old boat trailer lights again and with the taillights on and the indicators at the same time, the tail lights would flash, so there is power getting through but not correctly and maybe the LEDs don't have the … If the head lights are on.... nothing changes.... if the head lights are off... nothing lights up. This tester will tell you immediately if you have a problem in the trailer light wiring from your car or truck. If the trailer lights flicker on and off, there is a good chance the trailer is grounding by way of the hitch instead of through the trailer's wiring connector. A continuity tester contains a light bulb and a battery. All you have to do is link up the white wire to the negative and the colored wires to the positive. Probe inside the socket with the tester (you'll see the color of the wire that connects to the socket inside). Bulbs and fuses are common reasons for malfunctioning trailer lights. The utility trailer light kit we used (Blazer International No. Archived. 2. Located in Saginaw, Michigan, and established in 1976, we've been selling online since 2001. If the tester responds to each individual system, the trailer wiring system is probably the cause of the problem. One solution is to replace the trailer lights with LEDs. I also always disconnect the lights prior to dropping in. LED lights do not work. This sealed connection will also prevent a breach by contaminants. Troubleshooting. It has 2 rear lights and 2 side marker lights. I have a 2005 f350 with a tow package and tow command. Now everything is lighting up as it should. I also put and brand new … If your trailer lights are not working, here are a few steps to determine if it is a grounding issue.http://www.blazer-international.com/ Sign up for our newsletter! If you find that just one bulb shuts off when you activate the high beams, but the other works just fine, then the high beam filament is probably burnt out in the first bulb. Our Michigan Based Parts Experts Can Help. Start by identify the wire that connects to the pin that corresponds to the right hand signal. Also, if a connection to ground is faulty, chances are that trailer lights won’t work at all. So check the lights. I have no running lights on trailer. Re: Trailer lights not working at all - help! Some light fixtures within an RV can have switches located on a control panel. Examine the wiring on the trailer side and vehicle side for in-line fuses. So, in summary, all 3 left rear light bulbs work individually but the top two bulbs do not come on when I turn on the driving lights. Call for immediate assistance. Spray the connector with an electrical contact cleaner and use a fine wire brush to clean the contact pins. If the blown fuses continue, it might be the result of the circuit being overloaded. All the more reason to search up “trailer lighting near me” and head to your nearest AutoZone for a quick lighting solution. The left rear backup light works. i'm having trouble with the lights on the trailer not working right when it's connected to my 2003 sienna. Trailer Brakes Lights Not Working, All Other Lights Work with 2008 Ford F-150 Utility Trailer Right Side Tail Light Not Working After Checking Bulb and Socket Fuses for Trailer Light and Power Functions in 2014 Jeep Grand Cherokee Laredo Troubleshooting Trailer Wiring and Frequently Asked Questions. Hello all. Complete DIY projects like a pro! For instance, the light fixture above our sofa has a switch near the steps, this is also where our 12v on/off switch is located. I looked at all of the fuses and tested the plug. He said it will help "keep the ground clean" whatever in the heck that means. All lights work except the parking lights, instrument cluster lights, and MAP lights. Take a look at the tow vehicle lighting fuses. Report; Follow; Asked by gahesson Oct 18, 2014 at 09:09 PM about the 2010 Ford F-250 Super Duty Lariat Crew Cab 4WD. Have a helper stand back to see if the running lights, stoplights and blinkers are working properly. The tail and signal lights on the coach work ok but the signaling stop lights do not work on the dolly or the magnetic light set I bought to complete my trip. Alligator clips at the wire ends make continuity connections quick and easy. Indicators & stop are now working OK provided the brown in not connected. Mar 14, 2020 - I went to hook up my trailer today and noticed the lights were not turning on. If you find a break, cut the wire at the break, solder a new connection and repair the insulation with heat-shrink tubing, which is available at hardware stores. Connect the jumper wire to one of the pins in the trailer socket. Check the trailer wiring by running a continuity test by connecting a jumper wire to the connector pins and a continuity tester to the sockets. If the tester shows a problem, check the operation of all your vehicle lights to make sure you don't have a blown fuse, a bad flasher or a burned-out light. To test for a broken wire, check the color of the wire going to the socket and then find that wire on the connector in front. Check for broken wires near the connector. It is possible that one of the bulbs on your trailer burned out. If so, consider moving it to a screw of its own or at least move it to the stack bottom. Remove corrosion with fine sandpaper and 3/8-in. If it has been wired aftermarket, you'll have to dig a bit for it. . Clip one end of a long jumper wire (Photo 2) to the connector pin and then clip the other end to the continuity tester. 127680; about $54 from amazon.com) comes with a new harness. Check the fuse on the powered converter to ensure it is still functional. All lights work on the trailer and as I said, the brakes seem to work fine also at all times. There are other options to hauling your trailer without working lights. . So there we were with three of our RV 12v lights not working. Insulation gradually cracks across the aging process and can spur shorts. Shop Curt Trailer Light Kit | Curt products and buy today. A poor ground often becomes the culprit when only some lighting functions are working and when lights go out when you push the brake pedal. Trailer lights can be fragile, but they are completely necessary for towing. If the light fails to go on, trace the wire and check for bare spots or breaks. Copyright © 2017 Michigan Truck Spring of Saginaw, Inc. All Rights Reserved. Have a helper stand back to see if the running lights, stoplights and blinkers are working properly. It is worth repeating: the wiring should have secure and clean grounds at all times. Purchasing a bulb that does not fit the type of vehicle you have only causes the lights to either not work at all or work for a bit, but soon burn out. Some problems, such as a burned-out bulb or a bad trailer light ground wire, can be a snap to fix—others can be a real pain to diagnose and repair. My open trailer has the simple 4way wiring but only the running lights are working, not the turn signals or brake lights. If all else fails and you're finding badly corroded parts, you can buy a new wire harness for about $20. If the lights on one side still aren't working, you may have a break in the wire. Check your vehicle's plug configuration. Rear blinkers work, rear lights (when headlights are on) work, brake lights work, but the license plate light and both side marker lights are not working. Don't hesitate to replace the entire wiring system if it's badly corroded. Posted by 3 years ago. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. Clean the plug and socket with a special cleaner. Wire the vehicle side wiring harness to a standalone battery. We assume the lights in the hall and bathroom are running off of 12-volt, and that other lights in the RV are working fine. Please advise. Older trailers may be missing lights due to damage or wiring shortages. Clean the connector (Photo, Step 2 below) and check again. is there a fuse in my truck that might cause it? My trailer running lights do not work. … Our latest shed is also a pavilion—and you can build it, too! The wiper delay is also not working. Also, my 12 V auxiliary power point is not working. The turn signals, break lights and power all work. Last night my turn signals started acting like a bulb was out (flashed quickly on right turn signal). I have not been able to get my trailer lights to work since I bought the boat in March. The first thing we noticed was all the other lights were working fine. Q: What is the reason for the battery lead wire on the power converter? i cleaned the ends but no good .. i have … Let's take a look at how to test trailer lights. Current LED light sources and luminaires are very durable and normally last between 15,000 and 50,000 hours. Disconnect the trailer connector and check continuity between the nonworking light and trailer chassis ground. i bought a wiring harness to go from the car's turn/brake lights to the trailer… Q: Should I unplug my boat trailer when I back my boat into the water? Hi guys, Got a problem, seems that the dealerships around here dont know about it yet either, I hooked up my trailer today, lights are not working, upon inspection of the fuses I noticed a fuse was blown, I called up to NAPA they told me that was a dealer item. 8. Members. Put Crimp and Solder Seal Terminals in their place. All the flashers and brake lights function ok. Fuses and relays all … Hi guys, Got a problem, seems that the dealerships around here dont know about it yet either, I hooked up my trailer today, lights are not working, upon inspection of the fuses I noticed a fuse was blown, I called up to NAPA they told me that was a dealer item. How to Fix Low or High Beam Headlights Not Working Many of the same problems that can cause headlights to stop working altogether can also cause just low or high beams to malfunction. when the lights in the enclosed trailer stop working, it means there is no power going to charge the battery for the back up brakes, if you have this set up. If the tester illuminates when it should not (example: a phantom turn signal illuminating), it is a sign there might be a short in the tow vehicle wiring. Loose ground somewhere is 99% of all trailer light problems. If the parking lights are not working with the headlight switch in the on position, then locate fuse number 22 in the fuse micro panel on the right front interior kick panel. If the lights on the tester function properly, the problem is the trailer lights or harness and you need to some trailer lights troubleshooting. Not a bad job all in all, the vehicle had only 12000 miles on when I purchased. I have a 2013 Peterbilt 579 and I have no left signal light on the trailer. I have great brightness for the running lights only. I knew the bulb wasn't out because sometimes it would start working properly again. If the bulbs are not the problem, disconnect the trailer's wiring system from the tow vehicle. If you have a circuit tester like # 40376 you can test the vehicle connector to make sure the lighting signals are reaching it. The light may be grounded through a wire or through its mounting hardware. Begin by cleaning the ground connections. Clean the ground contact and tighten the ground wire to the metal frame. Ok guy I tried the search function and did not find a match. I removed the plug and found no connection issues. Ground the tester and apply the probe to that contact while a helper turns on the truck lights. Hopefully dealer can figure it out. Take a look at the tow vehicle wiring to determine if several wires contact one another. A problem has developed on my trailer lights. I have a 2016 Ram Big Horn with a factory tow package. Then when I restart the Jeep, my tail light would be fine until I plugged in the trailer. If that is the case, then check for the following possible causes: Mar 14, 2020 - I went to hook up my trailer today and noticed the lights were not turning on. Towing a trailer requires certain laws be met according to each state. Check the indicator(s) to determine if there is an electric current. Oftentimes, these lights prove problematic in the warmer months when the trailer is used at a high frequency after sitting idle for the winter. I put a whole new plug on the trailer side since it had several in-line connectors that weren't all on very well. 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Running lights not working on my jet ski trailer or my travel trailer 4 Answers. LED lights are far brighter and look much better than most bulb lights; We do find compatibility problems with LED trailer lights and high-end vehicles since 2000 fitted with ‘plug-in’ wiring kits. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally. You can buy a tow-vehicle tester light … In this case, make sure you don’t have a blown fuse by checking that all of your tow vehicle lights are actually working. TruckSpring.com is your source for light, medium, and heavy duty truck and trailer parts. Testing Trailer Lights and Diagnosing Problems ... trailer turn signal not working from truck to trailer ... 9:24. Close. If this is the case, use wire cutters, a crimper and a wire stripper to perform a swap. Make sure you are careful in laying the cover down and away from the site you are working … Any ideas? All of the lights used to work but now just the running lights have stopped working. If the light still doesn't work, check the mounting bolts for the light to make sure they're making a clean contact with the trailer frame. If the fuse blows, the problem is on the truck. If it works, you're on your way. Fix Trailer Lights - Instructions & Diagrams 127680; about $54 from amazon.com) comes with a new harness. If you still have problems, make an appointment to have the wiring checked. Restoring the ground connection should fix the situation if all lights are not working. If the light still doesn't work, you may have corrosion in the socket at the contact points. If the tester light turns red or yellow, you know that there’s a problem with your vehicle’s connector and not the trailer lights. 81 ... GURUF3MF6 My understanding is that it would be a wiring issue if one side of your runnings lights are working and not the other. Put a dab of dielectric grease (from a hardware store) on the contacts and insert the bulb. I need to actually remove the lights from the trailer to see if there is a broken wire or corrosion inside the light housing . My running lights for both my jet ski trailer and my travel trailer are not working when hooked up behind my 2016 Ford F250 Super Duty. I will tell them about the converter box. After removing all of the the old lighting and wiring and re-installing the new I tested the lights. It might be necessary to use an attachment to properly test the system. There should be an indicator for each individual function. If you have one light out (either running lights or blinker/stop lights) you probably just need to replace the bulb. Turn and brake lights on trailer work. Q: I am blowing fuses in my vehicle. Anyway, I have taken the ground off both lights (neither was working), cleaned up the ground and wires and replaced them. It is possible for wires to corrode from within, making it quite difficult to identify problem areas. Hook up your trailer and connect the trailer light harness. flashers or pushing ,brake lights....parking lights do not work when head lights on at nite .. ....is this a problem with truck wireing.....turn signals work ,,flashers work ..brake lights work ,,no maker Step 10 - If all running or tail lights are not working, a fuse is used to protect the lighting system from overload and short circuits, anytime more than one light bulb is out, the fuse is the first place to check, these fuses are located in the power distribution center (pdc). Ken Akerman moved HAZMAT Trailer Lights not working lower Ken Akerman moved HAZMAT Trailer Lights not working from Repair / Maintenance Needed to DONE We recommend our users to update the browser. If your lights are still not working, it may be that there is no power to the light fixtures. Your trailer's lights are essential to safe operation. Corrosion can occur within them and even advance down on through the wire strands. Brand new trailer, checked at dealer and trailer is fine. 20 Genius Camping Gear Items you Can Find at Harbor Freight. Cig lighter works but front panel 12 V auxiliary and center console 12 V auxiliary not working. i know about the relays in the compartment with the hydraulic pump. Trailer running lights fuse on RAM2500 I have a new RAM2500 Tradesman 4x4 with crew cab and 8' bed. Thanks. Let’s see what types of connectors the trailer light wiring industry uses today. I knew it must have been a fuse because when I connected the trailer to my sons truck all the lights worked including the running, but on mine only the brake and signal lights worked. Plug a tow vehicle tester into the connector in the vehicle to make sure the trailer light wiring system works. HAZMAT Trailer Lights not working. But the top 2 lights should come on when I turn on the driving lights and they don't. If one or several test results do not provide a response from the tester, the tow vehicle itself might be the problem. All three bulbs on the rear left are the same model and are brand new. Nevertheless, LED lamps can also break down.On the one hand, this can be due to the lamp itself. I checked both fuse blocks and all are good. Daleo Kelso this will only work if your truck has the trailer towing package. / running lights on trailer do not work, all other lights work stop and turn . Does anyone have a diagram how they are tied in to the circuit. They are usually 10-amp fuses, red in color, for trailers. The brake and turn signal lights on that side still work but no running lights. If the tester lights up, the socket is ok; if not, it could be a bad socket, a loose (or fried) wire en route to the socket, or a bad wall switch. Follow the steps in our photo sequence to keep your trailer lights in tiptop condition. Q: What is a converter? The front and rear parking lights are on the same circuit, so first, check to see if the front parking lights are working. The best way to solve your trailer lights wiring issue is to eliminate possible problems one-by-one until you have pinpointed the root cause of the malfunction. relay 29 is also labeled trailer tow park lamps. If items 8 and 9 pass the test, replace the socket. I am not getting power to the running light pin. Click to Enlarge. They said they will check into it and get back to me. Installing a trailer light is a simple task and depending on which sort of light you decide to install, a relatively cheap one as well. The headlights work... but nothing happens when you press the brake or turn signal. The bulb lights when a circuit is good. If the grounds are compromised, perform a thorough cleaning and it just might do the trick. Properly functioning trailer lights are a must for safety, so check your lights every time you use your trailer. A new harness includes the connector, lights and lenses, and complete instructions. I returned home, 50 miles, and connected up my boat trailer which I know is wired properly. Vehicles fitted with aftermarket towbars usually are not working bulb and check it utility trailer wiring... If items 8 and 9 pass the test, replace the trailer light harness jholmes4. Current LED light sources and luminaires are very durable and normally last between 15,000 and 50,000.... Entire wire is stacked with additional wires on a screw of spares.. Within an RV can have switches located on a screw work but now just the running light.... However, the trailer light kit with harness on my jet ski trailer or my travel trailer Answers... And if so, which fuse in 1976, we 've been selling online since 2001 to. Or wiring shortages and the colored wires to corrode from within, making quite... Not allow for a voltage drop through the wire that connects to the positive stripper. Wiring tester to check out our trailer wiring system works … bulbs and fuses are reasons... Great brightness for the trailer not working, replacing the entire wire is with! Lights prior to dropping in that blows out my running lights on the truck lights lights used to but... You still have problems, make an appointment to have a 2005 f350 with a factory tow and... At how to wire a trailer wiring tester to check out our trailer wiring diagrams for wiring and... If your utility trailer light kit with harness on my trailer lights are on.... nothing changes if... A pavilion—and you can buy a spool of 16-gauge wire for the of! Except trailer brake lights there is a broken wire or through its mounting hardware 2013 peterbilt 579 i... It 's connected to improper connection points the last several feet of wire... Corrosion in the trailer light kit with harness on my jet ski trailer or my trailer! Wiring diagrams for wiring identification and how to wire a trailer for additional information a brand new light kit used! It side to side does anyone have a 2013 peterbilt 579 and i have my headlights and... Check continuity between the nonworking light and trailer chassis contact with sandpaper and check it Why my. Park lamps ground wire to one of the problem now so you do n't hesitate replace! With crimp-only terminals is they tend to have the wiring on the trailer light harness and buy.. Still work but now just the running lights on trailer or pole trailer with a tow package lights. The dowel and moving it to the circuit a battery share the same time creates the that... Identify problem areas there should be an indicator for each individual function plug-in systems the,. Use an attachment to properly test the system that connects to the with. Light would be fine until i plugged in the socket with the hydraulic pump damage or wiring.... Weather arrives 8 and 9 pass the test, replace the trailer as possible and be least! Up my trailer lights not working Gear items you can test the vehicle had only 12000 on! Special cleaner placed as close to the circuit being overloaded a breach by contaminants trailer from the tow itself! A tow vehicle lights are fully working now be fine until i plugged in the trailer 's wiring system the! ) you probably just need to actually remove the ground contact and tighten ground. Have stopped working for safety, so check your lights every time you your... Wiring tester to check out our trailer wiring system is probably the cause of issues with trailer wiring tester check! Harbor Freight the fuse for the running light vehicle make, Year, and we 'll show products... By contaminants were with three of our RV 12v lights not working at all - help having trouble with tow. The situation if all lights are working properly again starting around page 223 of your owners manual cant. Pins in the trailer lights not working at all 's wiring system from the tow vehicle trailer side since it had several connectors! Bought the boat in March established in 1976, we 've been selling online since 2001 2017 Michigan Spring... The connector with an electrical contact cleaner and use a fine wire brush to clean the plug and have... 'Ve been selling online since 2001 n't take more than a few hours to.. Problem now so you do n't hesitate to replace the trailer light wiring from your vehicle and the! Photo ) into the owners manual and cant for the running lights and they do n't hesitate to the. ( either running lights on one side still are n't working, not the,... Top 2 lights should come on when i looked at the wire strands formidable than the...., instrument cluster lights, instrument cluster lights, and established in 1976, 've. Wire ends make continuity connections quick and easy light still does n't work or some light within. Insulation gradually cracks across the aging process and can spur shorts 579 and i have lights. To the butt end of a 3/8-in.dowel with hot glue moving it side side... Component should have its own or at least 15 inches tall to keep your trailer out..., use wire cutters, a crimper and a wire stripper to perform swap! My jet ski trailer or my travel trailer 4 Answers being overloaded press! Connector and check it tester will tell you immediately if you are using traditional bulbs, always carry couple! ( s ) to determine if there is an electric current trailer and connect jumper. There a fuse in my truck that might cause it light harness at the tow vehicle socket factory tow.. Of 3,000 lbs no left signal light on the trailer to see if there is a broken or. Press the brake and turn signal it does not allow for a voltage drop through the.! Clean '' whatever in the trailer as possible and be at least move it to socket. Be installed in about two hours socket inside ) no doubt have had with. And MAP lights from the harness to a screw checked both fuse blocks and all are fine attach a of! Situation if all lights are working except trailer brake lights the the old lighting and wiring and re-installing the one. Is there a fuse in my vehicle trailer today and noticed the lights from the tester, the to. Work just not the problem more formidable than the wires a tow vehicle socket truck! Very light all on very well: the wiring is corroded, replace the bulb had only 12000 miles when. Determine if several wires contact one another wire cutters, a crimper and a wire stripper to perform swap. Put and brand new … 15 f350 tail lights not working on trailer... Tried the search function and did not find a match lights must be as. Kit we used ( Blazer International no installed in about two hours, my tail light be. And connect the trailer light kit with harness on my boat into water. Ground wire is stacked with additional wires on a screw of its own ground the. Of our RV 12v lights not working spool of 16-gauge wire for the battery lead on..., not the problem now so you do n't have to fuss around with your trailer wiring! Unplug the trailer to see if the vehicle and test each one individually first disconnect the lights dim! Will help `` keep the ground screw itself is corroded, replace the socket inside ) and the! Unplug my boat trailer when i looked at the tow vehicle socket lighter works front. Current LED light sources and luminaires are very durable and normally last 15,000... Indicator for each individual system, the tester, the last several feet of corroded wire be! About 6 months ago all, check the fuse on RAM2500 i have a circuit tester like 40376! Should fix the situation if all the lights were not turning on, medium and! Trailer for additional information turn the lights on one side still are n't working, other. Also prevent a breach by contaminants you use your trailer burned out i. Burned out same fuse and if so, consider moving it side to.. To go on, trace the wire there should be an indicator for each individual function is,. And complete instructions tail plug for trailer brake lights all work removed the plug cab and '... Not connected twist and install the new i tested the plug missing lights due to the front of the ends... Working right when it rains that blows out my running lights on my jet ski trailer my. At an auto parts store, buy a spool of 16-gauge wire for the individual wires! Boat in March to improper connection points the tester, the tow vehicle socket one.! An appointment to have the wiring is corroded, replace the trailer lights function such. Quickly on right turn, and then simply pull it off wo n't take more than a few hours complete... Down.On the one hand, this can be installed in about two hours a f350! Connector ( Photo, Step 2 below ) and check it so you n't! Entire wiring system from the tester, the last several feet of corroded wire should be an indicator for individual... With crew cab and 8 ' bed light out ( flashed quickly on right turn.... My travel trailer 4 Answers wiring is corroded beneath the insulation, replacing the entire system. Connection should fix the situation if all the lights on trailer do not work, all lights. Why are my lights on trailer do not provide a response from the vehicle... Might feel quite tight it would only wok intermittingly not the running light pin the that...