Hey all, so couple days ago took off all 5 of my cab clearance lights and installed bullet style dual revolutions. I cut the connectors off old lights and soldered into new. I ran a wire for the color change but didn’t connect it to power. When I plugged in the lights nothing happened! Today I came out with multimeter and the plugs on truck harness aren’t getting power when I hit the marker light switch. Everything else works. I swapped around all the relays and cannot find a popped fuse. I am getting very frustrated because I won’t dare take a load across a scale house without functioning lights. What am I missing? What did I do wrong? 2007 379
Cab clearance light issue
Discussion in 'Peterbilt Forum' started by Dallison, Jan 3, 2023.
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Wiring diagram shows a connector on the firewall between the 'main cab roof harness' and the 'roof dash connect'. Yellow and white wires
If all your other marker clearance lights work I'd check at that connectorOxbow Thanks this. -
Oxbow Thanks this.
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Did you check for power at the switch?
Oxbow Thanks this. -
Last edited: Jan 4, 2023
Oxbow Thanks this. -
I’m about to have to start digging through wires and looking for a short, but it baffles me as to what I could have done to mess up the wiring and it not be getting power but every other wire up there getting power- old lights worked fine, unhooked them and plugged in new ones.
Oxbow Thanks this. -
If you've got power at the switch I'd check behind the overhead console, you probably just pulled that connector apartOxbow Thanks this. -
Oxbow Thanks this.
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