2007
Should be a panel behind the pedals. Fuses and relays are in there.
First indication is model year. The 379 replaced the 359 in production in 1987, and was manufactured until 2007.
It might be the switch itself.
Seems like there's a short in the wiring somewhere.
Peterbilt's flagship truck, the 379, was in production from 1987 - 2007. It's hood was made from aluminum and it was the last conventional over-the-road truck available with this type of hood.
I have a 2006 peterbilt 379 with a c -13 there is a cat service bulletins on heads cracking i know this as i had to due my motor in Sept 09 for a cost of 32 000.
There isn't a specific fuse for it... power is supplied to that circuit by existing fuses. You probably have a bad switch.
Bad wiring or bad outlet.
It's a Peterbilt 379
The turn signal flasher relay switch, on a Peterbilt 379, is located under the dashboard. The relay simply plugs in.
How do you ajust the door on a 379 pete