Sign up for our newsletter! 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 HAZMAT Trailer Lights not working. 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. Clean the connector (Photo, Step 2 below) and check again. Call for immediate assistance. Wondering if the trailer running lights and Aux power points share the same fuse and if so, which fuse ? 8. Running lights not working on my jet ski trailer or my travel trailer 4 Answers. 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. Hook up your trailer and connect the trailer light harness. Re: Trailer lights not working at all - help! If it has been wired aftermarket, you'll have to dig a bit for it. 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. They said they will check into it and get back to me. At an auto parts store, buy a spool of 16-gauge wire for the individual ground wires. 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. Hook up your trailer and connect the trailer light harness. Bulbs and fuses are common reasons for malfunctioning trailer lights. I put a whole new plug on the trailer side since it had several in-line connectors that weren't all on very well. Trailer wiring kits are surprisingly affordable. Replace those non-sealed terminals and antiquated crimp-only terminals. Remove corrosion with fine sandpaper and 3/8-in. I knew the bulb wasn't out because sometimes it would start working properly again. then off again. I've replaced everything from the harness to the LED lights. … All of the other signal lights work on the tractor. At an auto parts store, buy a spool of 16-gauge wire for the individual ground wires. Connect the jumper wire to one of the pins in the trailer socket. If you are using traditional bulbs, always carry a couple of spares too. 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. Troubleshooting. If the bulbs are not the problem, disconnect the trailer's wiring system from the tow vehicle. my trailer lights only work when using turn signal. I removed the plug and found no connection issues. 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. i bought a wiring harness to go from the car's turn/brake lights to the trailer… Clip one end of a long jumper wire (Photo 2) to the connector pin and then clip the other end to the continuity tester. when I looked at the fuse for the trailer charge circuit, in my truck, it was blown. 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. Are there relays that I am missing? Check the indicator(s) to determine if there is an electric current. 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. Vehicles fitted with aftermarket towbars usually are not fitted with these plug-in systems. Not a bad job all in all, the vehicle had only 12000 miles on when I purchased. The first thing we noticed was all the other lights were working fine. Complete DIY projects like a pro! 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. All of the lights used to work but now just the running lights have stopped working. Remove the lens, replace the bulb and check it. While the basic configuration is a 4-way flat connector that features one female and three male ends, you may come across connectors with up to seven pins for additional functions that require wiring, including electrically actuated brakes, power source for a winch, etc. Indicators & stop are now working OK provided the brown in not connected. So check the lights. One whole side of my trailer lights stopped working. All the flashers and brake lights function ok. Fuses and relays all … Towing a trailer requires certain laws be met according to each state. First disconnect the harness and plug a tester (Photo) into the receptacle from your vehicle. Select your vehicle Make, Year, and Model, and we'll show you products engineered for your vehicle. but not running lights. Located in Saginaw, Michigan, and established in 1976, we've been selling online since 2001. i hooked up another truck to my trailer and the trailer worked fine. Plug in the tester to the socket. I have a 2016 Ram Big Horn with a factory tow package. If one or several test results do not provide a response from the tester, the tow vehicle itself might be the problem. Its a basic 4 prong connection. My trailer running lights do not work. 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. At first I thought it was my truck because I checked the factory plug and it would only wok intermittingly. Before you go all out on the repairs, there are a few things you shouldn’t ignore; your situation might be a burnout bulb, so try replacing your trailer lights to confirm that the fault is not with the bulb -- read here how to test a car light 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 . 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 Clean the plug and socket with a special cleaner. I have great brightness for the running lights only. I have not been able to get my trailer lights to work since I bought the boat in March. Wire the vehicle side wiring harness to a standalone battery. 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 vehicle's lighting system functions as designed, grab a trailer wiring tester to check the tow vehicle socket. All lights work on the trailer and as I said, the brakes seem to work fine also at all times. Check your vehicle's plug configuration. I will tell them about the converter box. I have no running lights on trailer. If the ground screw itself is corroded, replace it with a new screw. You can buy a tow-vehicle tester light … Make sure you are careful in laying the cover down and away from the site you are working … Turn and brake lights on trailer work. Each component should have its own ground to the frame of the trailer. It also might be possible that several wires are connected to improper connection points. Two types of a trailer wiring tester. 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. If all the lights appear dim or you have no lights at … Be sure to check out our trailer wiring diagrams for wiring identification and how to wire a trailer for additional information. Re: Running Lights On Trailer Not Working Dec 20 2013, 11:53pm On my trucks the trailer light fuses are inside the truck in the fuse panel, which is on the driver … Also, my 12 V auxiliary power point is not working. Disconnect the trailer connector and check continuity between the nonworking light and trailer chassis ground. Mar 14, 2020 - I went to hook up my trailer today and noticed the lights were not turning on. Mar 14, 2020 - I went to hook up my trailer today and noticed the lights were not turning on. Ok guy I tried the search function and did not find a match. All three bulbs on the rear left are the same model and are brand new. Take a look at the tow vehicle lighting fuses. 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. Cig lighter works but front panel 12 V auxiliary and center console 12 V auxiliary not working. Nevertheless, LED lamps can also break down.On the one hand, this can be due to the lamp itself. The best way to troubleshoot your trailer lighting problem is to unplug the trailer from the tow vehicle and test each one individually. Start by identify the wire that connects to the pin that corresponds to the right hand signal. Attach a bit of 220-grit sandpaper to the butt end of a 3/8-in.dowel with hot glue. Alligator clips at the wire ends make continuity connections quick and easy. Remove the ground screw and sand the wire terminal and trailer chassis contact with sandpaper. Left turn, right turn, and brake lights all work. Now everything is lighting up as it should. 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. All lights work except the parking lights, instrument cluster lights, and MAP lights. Thanks. It does not allow for a voltage drop through the connection. A continuity tester contains a light bulb and a battery. Why are my lights not working? check starting around page 223 of your owners manual.. If the tester responds to each individual system, the trailer wiring system is probably the cause of the problem. 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. Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003 There should be an indicator for each individual function. In most cases, it can be installed in about two hours. Our Michigan Based Parts Experts Can Help. 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. Q: What is the reason for the battery lead wire on the power converter? A problem has developed on my trailer lights. If the light fails to go on, trace the wire and check for bare spots or breaks. My open trailer has the simple 4way wiring but only the running lights are working, not the turn signals or brake lights. Have a helper stand back to see if the running lights, stoplights and blinkers are working properly. If the light still doesn't work, you may have corrosion in the socket at the contact points. Insulation gradually cracks across the aging process and can spur shorts. Daleo Kelso this will only work if your truck has the trailer towing package. Trailer running lights fuse on RAM2500 I have a new RAM2500 Tradesman 4x4 with crew cab and 8' bed. 127680; about $54 from amazon.com) comes with a new harness. 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. If the lights on the tester function properly, the problem is the trailer lights or harness and you need to some trailer lights troubleshooting. If this is the case, use wire cutters, a crimper and a wire stripper to perform a swap. Next, check the ground wire. Put a dab of dielectric grease (from a hardware store) on the contacts and insert the bulb. In this case, make sure you don’t have a blown fuse by checking that all of your tow vehicle lights are actually working. . If items 8 and 9 pass the test, replace the socket. Most problems occur here. 15 F350 tail lights not working , all other lights work. I was once told by an old time to not rely on my auto lights and to turn the lights on manually. 2012 peterbilt 386 all lights are working except trailer brake lights I'm getting no power to pig tail plug for trailer brake lights. Yellow front side lights must be placed as close to the front of the trailer as possible and be at least 15 inches tall. 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. If the grounds are compromised, perform a thorough cleaning and it just might do the trick. I returned home, 50 miles, and connected up my boat trailer which I know is wired properly. Clean the ground contact and tighten the ground wire to the metal frame. If all else fails and you're finding badly corroded parts, you can buy a new wire harness for about $20. Some light fixtures within an RV can have switches located on a control panel. If you have a circuit tester like # 40376 you can test the vehicle connector to make sure the lighting signals are reaching it. Archived. If that is the case, then check for the following possible causes: 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. 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. Examine the wiring on the trailer side and vehicle side for in-line fuses. Let’s see what types of connectors the trailer light wiring industry uses today. So check the lights. i know about the relays in the compartment with the hydraulic pump. 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. 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. dowel to get into tight spaces. If the vehicle's lighting system functions as designed, grab a trailer wiring tester to check the tow vehicle socket. Why Do My Brakes Lock Up When Trying to Stop? Click to Enlarge. Ground problems are the top cause of issues with trailer wiring. They are usually 10-amp fuses, red in color, for trailers. Then when I restart the Jeep, my tail light would be fine until I plugged in the trailer. 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. 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. But the top 2 lights should come on when I turn on the driving lights and they don't. Troubleshooting. I have a 2005 f350 with a tow package and tow command. Check the necessary things. The headlights work... but nothing happens when you press the brake or turn signal. The turn signals, break lights and power all work. Start at the tow vehicle. Arjuna George (arjunageorge) Jamie Holmes (jholmes4) Ken Akerman (kenakerman) Chunsberger (chunsberger) Actions. However, the tester must fit the tow vehicle socket. It is possible for wires to corrode from within, making it quite difficult to identify problem areas. expert reply by: Adam R. Q: When I have my headlights on and apply the brakes all my lights on my trailer go out. At a bare minimum, the last several feet of corroded wire should be replaced. 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. Spray the connector with an electrical contact cleaner and use a fine wire brush to clean the contact pins. 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