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2006 Peterbilt 378 Wiring schematics

Discussion in 'Peterbilt Forum' started by Deere160, Sep 26, 2022.

Sep 26, 2022 #1

Deere160 Bobtail Member

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Sep 26, 2022

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I just recently purchased a Peterbilt with a c-13 and a 10 speed eaton. It has a bunch of random issues with the headlights staying on then the running lights will stay on. Does anyone have the electrical diagram for this truck? I have been on Supermiller and the diagrams are close, but mine appear to be different?

Deere160, Sep 26, 2022

Deere160, Sep 26, 2022

#1
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Sep 27, 2022 #2

Deere160 Bobtail Member

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Sep 26, 2022

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Anyone?

Deere160, Sep 27, 2022

Deere160, Sep 27, 2022

#2
Sep 27, 2022 #3

Oxbow Road Train Member

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Deere160 said: ↑

Anyone?
Click to expand...

I don't, but I got schematics for my 89s from my parts guy at the dealer in pdf.

By the sounds of your issues you might try swapping relays.

Oxbow, Sep 27, 2022

Oxbow, Sep 27, 2022

#3

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