Driver side trailer light not working

 · 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. 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.  · A loose ground wire will keep the lights from working. If the ground attached to the trailer does not give you an adequate ground, you can run the wire up to the ground circuit on the trailer connector. Next, you want to make sure the wiring on the trailer is 5/5(22).  · Driving at night with either brake lights or tail lights not working is dangerous for you and other drivers on the road. It takes a long time to notice when the brake lights not working but tail lights are or vice versa. It is so because you won’t know what is happening in the backside while driving until someone points it out.

Your brake lights and turn signals for each side are on one circuit. The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect and test the connector at the rear of your tow vehicle with a circuit tester, like # If the problem is there then you need to clean it, if necessary, and if that doesn't fix it the problem is in your vehicle. Just the trailer has issues. Sent from my iPhone using Tapatalk. Yep. The fuses are for the trailer lights only. The truck's signals will still work. If you pop the cover off the fuse box under the hood, I believe they are #16 and #17 fuses. One for left, and one for right. Edited July 6, by LowbanksArcher. It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side trailer connector using a circuit tester such as # Turn the vehicle headlights on and use the circuit tester to test the pins on the connector at the back.

When trailer lights don't work Smart Light identifies the problem The only lighting system that monitors stop / turn / tail light functions and finds the. I have a trailer light problem that is driving me nuts. The two fuses that control the trailer turn/stop are in the side dash and. I am having the same problem on the left side trailer lights no Most often the trailer wiring is the problem seldom the truck.