Wire 704!!!

Discussion in 'Peterbilt Forum' started by atbtrucking, Sep 22, 2021.

  1. atbtrucking

    atbtrucking Bobtail Member

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    Jul 28, 2021
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    1998 Pete 379 - I have a switch on the dash that has a 704 and 298 wire. When the switch is activated, you can hear a clicking noise (relay) inside the dash. When you click the switch to the off position, same noise. know the 298 is coming from the breaker circuit, and for the life of me, WE (Peterbuilt store) cannot find 704 on the Wiring Schematic. The switch is surely a factory plug hooked up, but what is it operating?
     
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  3. Nss

    Nss Light Load Member

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    Jul 5, 2021
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    298 is day running light module wire
     
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  4. atbtrucking

    atbtrucking Bobtail Member

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    Jul 28, 2021
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    On a 98 Pete with sealed beam head lights? Please explain a little further to help me understand. No label on that switch, but if I turn it on, will I have daytime running lights?
     
  5. Nss

    Nss Light Load Member

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    Just stated what my diagram shows. I dont know what options your truck has. Is the switch you are talking about marked?
     
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  6. Nss

    Nss Light Load Member

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    Is switch single or double pole?
     
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  7. atbtrucking

    atbtrucking Bobtail Member

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    Jul 28, 2021
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    It's not marked and it has a double poled socket with only 704/298 wires connected. I have a diagram that shows 298, but not 704.
     
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