Both turn signal lights come on when I press on my brakes in a 1991 Chevy s10
2 Answers
Probably a bad ground on one of the brake light bulbs. I have also saw that one of the brake light bulbs had burned out and the filament in that bulb fell into a place in the bulb that caused your problem.
I figured it out. It was the cicular relay driver side lower dash.
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