All of a sudden my rear running lights stopped working, brake lights, turn signals and hazards are working fine. I recently upgraded all of my lights to Custom Dynamics LED and I have had no issues until tonight. I have checked connections, fuses and wires under the fender to ensure none were rubbing or frayed. Very frustrated since I just spent all of the money on the LED lights.

any ideas??

 

Do you have a multimeter? Let's start by checking voltage at the lights. If you have it at the light make sure it's +12v not -12v Leds are directional(if they worked before this shouldn't be an issue). If you don't have it at the lights start back tracing the circuit until you find 12v. If you have voltage we need to test the lights directly. You can use a test light if you don't have a multimeter, the meter just gives a numeric result. Let me know what you find out. Test don't guess.