03 peterbilt 379 same dam thing .
Replaced all 4 headlights
2 low
2 high.
Replaced turn signal switch.
Fuse is good
Relay new
Still no lights.
Any idea would be helpful thanks much in advance.
Head lights
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BRD TRANSPORT, Mar 8, 2024.
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Got power where the wiring plugs under radiator ?
Run a ground wire to headlights.
Had same problem when I put new led headlights in a few years ago.
Lost the groundMagoo1968 Thanks this. -
Had already checked that and spliced a shaky wire.
Looked behind dash at light toggle and saw it had melted alittle. Replaced it and put connectors on wires .
Hard wire so to speak and bingo lights.
Dam I was ready to throw in the towel and pay someone to fix it.
I got lucky..
Thanks for the tip just the same. -
Might want to change that fuse. It should of tripped..
It's always something.Magoo1968 Thanks this. -
Did you go from Halogen to LED? Some require you wire the lights differently.
Magoo1968 Thanks this. -
BoxCarKidd Thanks this.
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