Right Hand Brake and Turn Signal Light is not Working a 2006 Chevrolet Tahoe

Question:

Tail light works but not the brake light or turn signal on the right side of trailer. 4Flat plug Connecting to 2006 Tahoe. Installed new sealed bulb. Still doeds not work. What should I look for to correct this situation. Thank you.

asked by: Earl W

Expert Reply:

The first thing to check would be the Tahoe to make sure it is sending the signal when it should be. Use a circuit tester, like part # PTW2993, to check each pin on the connector on the Tahoe. The exposed pin will be the ground, so connect the clip on the tester to it. The pinhole farthest from the ground should be the right-side blinker and stop. If it comes on when you hit the brake and turn on the right blinker, then the problem is on the trailer. If it does not come on, then there is something wrong with the vehicle wiring and you will have to check for broken, nicked or frayed wires for the trailer connector.

On the trailer, check the ground connection for the light. Make sure the grounds for the light have direct contact to metal and are not inhibited by paint or corrosion. If the problem is not with the grounds, then the light is simply not receiving the signal.

Finally, trace the green wire from the back of the right light up the length of the trailer. Check for nicks, frays or breaks in the wire. Follow the wire all the way up to the trailer connector.

expert reply by: Patrick B