Ellie Niner
Full Access Member
- Joined
- Aug 7, 2021
- Posts
- 382
- Reaction score
- 614
- Location
- Tucson, AZ
- First Name
- Tory
- Truck Year
- 1986
- Truck Model
- K10 Silverado
- Engine Size
- LE9 305
Okay. It sounds like you may have left and right brake or turn signal circuits shorted together somewhere. Here's a couple tests to help narrow it down: does the turn signal flasher still flash the lights when the parking lights are on? Does the hazard flasher work (the actual button on the right side of the steering column)? It should stop flashing and all four corners illuminate steadily when you step on the brake. With the ignition switch off, step on the brake pedal... both brake lights should illuminate. Keeping the ignition off and with your foot on the brake, turn on the left turn signal... the left brake light should go out. Repeat for the right turn signal... right brake light should go out. If either of the green turn signal indicators on the dash come on (along with front turn signal) when doing this, you've got the two sides shorted together at some point.