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79 f 150 I put led lights in for blinkers front and back. The right low voltage flashers and 50 watt resistors. Blinkers work great except when you turn the headlights on or hit the breaks. They will just stop flashing. I cleaned all 4 grounds any ideas? I am stumped with this one.
The Brake Light Switch feeds the steering column Turn Signal and Hazard switch which then combines the turn signals to feed the rear turn/brake lights.
Perhaps you did something with the park/clearance lights and/or brake lights?