I have a 2001 Peterbilt 379 with a cat c-12 engine. All circuit breakers are pushed in so its not that. Also changed the box that's on the firewall. But when I turn my key all lights come on and then go out. When I try to start it does nothing at all. But if I take the female plug that goes in to the relay box on the firewall out and run a wire across it the truck starts perfectly which rules out the starter or batteries being bad. I'm guessing it's the ignition but I'm just trying to get some input
Peterbilt won't start
Discussion in 'Trucks [ Eighteen Wheelers ]' started by PacManTrap, Mar 30, 2016.
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There is a small relay behind the panel on the left of steering wheel. You have to remove the dash panel to get to it. This relay can go bad and the truck will not start. I have a picture of it and I will post in a moment.
PacManTrap Thanks this. -
Here is a picture of the relay.
Attached Files:
PacManTrap Thanks this. -
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I would start with that and see what happens. If it isn't that hold on to the old one. You WILL have to replace it one day.
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Thanks I will try that tomorrow and see what happens. Appreciate the response
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Anytime
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Has your Pete ever had a driver side window leak or DOT light leak.
I'd look into an ignition switch, they are notorious for failing also.PacManTrap Thanks this. -
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I had a 68 dodge as a kid that whats called a fuseable link i think. Fancy way saying fuse for ignition system. I wonder if your relay is anything like that.
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#shouldagotavolvo
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