don't have any tail lights and a 1990 GMC Sierra

Asked by Jun 08, 2014 at 03:05 PM about the 1990 GMC Sierra

Question type: Maintenance & Repair

told tail lights out check circuit with
test light all circuits are hot

4 Answers

104,235

Check both wires going to light sockets. Must have power on one and ground on the other.

104,235

Probably lost your ground circuit.

that will make all circuits hot

104,235

No for lights to work one wire has to have power and the other has to have ground. Without either your lights won't work. Need to find out which circuit you lost. Power or ground. You stated there was power so that leads me to believe the ground circuit is lost.

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