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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5552
Experience:  Owner at DJ Wilson
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I have a 2001 378 peterbult does the cooling fan have a

Customer Question

I have a 2001 378 peterbult does the cooling fan have a relay if so were is it
JA: We'll do all we can to help. Tell me a bit more about what's going on so the Heavy Truck Mechanic can help you best.
Customer: I have no power to the air valve or the a/c switcy
JA: Is there anything else important you think the Heavy Truck Mechanic should know?
Customer: no I just need to know were the relay is
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Heavy Truck Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.

Hi my name is***** will be glad to help. Click on this link for the wiring diagram. The Relays are on the RH side of the schematic. Yes there should be a fan relay in the fuse/relay panel.


Customer: replied 1 year ago.
Is this for the cooling fan for the raditor
Expert:  Daniel Wilson replied 1 year ago.

What engine make and model is on your truck? The engine schematics will complete the diagrams. Let me know