Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Brake lights don't work on truck or trailer.

(1999 Dodge Ram 2500)
in Conyers, GA on March 07, 2009
Fuses are good and bulbs are good can't locate problem. HELP!
Displaying 2 answers & 0 comments
Popular Answer
on March 07, 2009
Check for 12 volts at the fuse. A good fuse means nothing if no voltage is present. Fuse #13 (20A) in the Power Distribution Center powers up the brake lamps switch. Equally important is checking the lamps ground circuits. All else checking out ok, replace the brake lamps switch.
on February 13, 2014
In the front drivers side under the cab you will find where the electrical harness comes out of the cab. There on the cab side should be a light blue wire which is the brake signal to the trailer. Make sure on the plug that attaches to it there is a light blue wire going to the back of the truck. This wire was omitted on my truck! Bought a brake system for mine even though it came with a towing package it didn't get the blue wire! I had to splice into the wire and run a wire to the back. Hope it helps
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
The truck runs fine had to replace that BCM about 3 months ago because my lights and my windows wouldn't work. After ...
My Armada won't start or turn over. Oil was reading high then next day won't start
Didn't find what you were looking for?