98 379 , no bright lights! Changed the entire turn signal and dimmer switch to a brand new unit. Checked all the circuit breakers and fuses. Dash light shows it’s changed to bright but the head light stay on dim. Any help is much appreciated.
No bright lights
Discussion in 'Peterbilt Forum' started by spurmonkey, Jan 25, 2021.
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Does a '98 still use relays to switch between high and low?
My '89 doestruckdriver31 Thanks this. -
Have you confirmed 12v and ground at the plug?
I’d back probe the ground at the plug with a jumper for giggles.
If you don’t have 12v switch relays, then if nothing start chasing wires.
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