Have a 1995 Peterbilt 379 that has been having blinker problems. Mainly the passenger side blinker will not work. Replaced blinker relay and fuse which both burned. Tried new turn signal switch but still did not solve the problem. I unhooked the trailer plug but did not solve the problem.
If I take a test light and touch any hot no matter the hood, turn signal switch, trailer plug or the rear blinker power wire the blinkers will blink
1995 Peterbilt 379 Blinker Problems
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Asanchez, Mar 30, 2026 at 6:29 PM.
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