Truck Running Lights Not Working

September 06, 2021

Starting at the trailer connector, check all of the ground connections on your trailer as you work your way to the tail lights at the back of your truck. Turn on headlights and no lights turn on rear of truck.

Black 20042012 Chevy Chevrolet Colorado GMC Canyon Osram

This is how people turn on their running lights while parked at a campsite.

Truck running lights not working. For the truck equipped with the package: 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. Simply, your bulbs have gone bad.

There are 3 fuses beside the relays that control the directional lights and brake lights. Check the main trailer ground and the grounds for each of the trailer lights. Dont have drl on my truck maybe this can help you per alldata daytime running light operation</b> the headlight is turned on when all the following conditions are satisfied.

Daytime running light not working. A recent accident at the tail end of your car can increase the likelihood of this problem. The two lightings use different wiring as each bulb has got its power supply.

What if it's pitch black out?? If it has been wired aftermarket, you'll have to dig a bit for it. Hello, there is a parking lamp relay that needs to be checked.

Remove the bulbs by slightly twisting and ensure the ones you install work correctly before twisting in. Running lights on trailer not working. Daleo kelso this will only work if your truck has the trailer towing package.

Also the light sensor in the dash center by windshield may have fallen into dash. To test your trailer lights to make sure they work without hooking up to your truck jumper out the 12v and running lights pins. I've lost my trailer running lights.

They do flash when i lock/unlock the truck, though. That's all i can think of off the top of my head. If the vehicle side connector is working properly, then the issue is likely on the trailer.

Ford dealer over the phone when looking for cheaper part. If not, i would start at the connector in the bumper and work your way back up the harness looking for loose connectors or damage. Ground the tester and apply the probe to that contact while a helper turns on the truck lights.

If the steps above have not solved the problem causing your trailer’s running lights to not function correctly, then it could be that there is an issue with the bulbs. Brake lights work, turn signals work, just no 'running' lights when headlights on. Trailer lights all in working order, plug into truck, no lights.

Engine running, in drive, sunny day with the lights on or off. As stated previously, you'll also need a volt meter. When the ignition switch is on position;

I guess this one could fall under the electrical section or this one. Here is the latest from our ford technician which sounds like a crock to us, however, we had the same problem with our trailers. Fuse f31 will be for the parking lights on the trailer connector and fuse f58 is for the trailer connector backup lights.

Ford says, fuse (#90) is designed to fail if trailer is plugged in with vehichle and/or lights on.. My usual mechanic traced problem to $850 pcm. They work fine on the truck, but my tester on the trailer plug says they are out.

Personally i'm not a fan of it but it'll help you troubleshoot. I have brakes and signal lights, no running lights. Because the most common reason for trailer lights not working properly is a bad or missing ground, check the trailer’s and truck’s ground connection first.

The book says trailer running lights are fuse 29 but that picture, man, i can't read it. The fuse panel inside the cab doesn't have the running lights and i cant find the one outside of the truck I'll start off by saying we've ruled out this being a problem with the trailer wiring because we've checked the lights with other trucks and they work fine.

So, if your tail lights are not working, you need to check if your bulb is okay. The truck's running lights will work, but the trailer won't if the fuse is blown. If you're not familiar with the wiring on the plugs, the easiest way to get it right, is to connect a test box to the rv connection or, remove the wires from the rv plug, plug it in to the tow vehicle and then using a test light, turn on, say, the parking lights, find the terminal that's now lit up on the tester and install the wire for the parking/clearance lights, then go to the next set of lights and so on.

Obviously the rear lights do not work, how about the front? If the fuse does not blow, and if you detect a 12v signal on the contact, then you know the issue is on the trailer. When the light control sw is off position;

I changed the fuse and the relay for the drl's, but it made no difference. Also the wiring diagrams for the fog lights which they call clearance lamps so you can see how the system works. Check fuse 31 and 33 under the hood.

If they didn't flash with the lock/unlock, i'd suspect a wire. When the parking brake sw is off position Damaged or disrupted wiring can cause tail lights not to work, but brake lights are.

But it's got me kind of mystified at this point. If the fuse blows, the problem is on the truck. When the generator is generating electricity;

They fuse the trailer running lights seperate from the trucks, so if you have a bad connection or ground the connector out, it will blow the trailer running light fuse, but the truck will be fine. The relay box is the smaller of two boxes on the passenger side. Check the fuses in the relay box under the hood.

If both are out, front and rear, get a haynes manual for your year and make, there are wiring diagrams in the back of the book. So, the breaking lights might be working if their. Here is a guide to help you and the location of the relay.

This solved my problem having running lights ,but. Discussion starter · #1 · dec 5, 2016.

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