Thanks for the help. This truck has an aftermarket utility body the lights are LEDs. I had to rewire a few because the plug ins were corroded. Everything works except The turn signals need the brake being applied.
Hi I have 2001 C3500. I am having a problem with the turn Signals, they will not work unless the brake pedal is depressed. Does not make any difference if the ignition is on or off. I replaced the brake switch, but no luck. I just bought the truck but the last owner said it didn’t do it before...