Bought a 1980 toyota with a 4.3 in it. Swapped in a chevy V8. Harness is still in the truck. Found all my wires for lights and such. Everything worked fine until today. My brake lights and blinkers swaped on me and when I turn on my blinkers, all my lights in the rear blink at once.

I hit brake pedal and my blinkers light up. any ideas?

 

Sounds like some wires got crossed. Have you tried swapping them?

 

Worked fine yesterday. Didn't mess with any wiring today or yesterday. It just happend today. Was welding..? Maybe fryed somethin? Front bumper. Ever heard of this before? Brake and blinkers swapping? Puzzles me. Would love to know what causes this and how to correct it. No open wires anywhere.