Back-up/ night lights on 2003 9400 international

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bulldozerbert, Nov 24, 2009.

  1. trucker1farmer

    trucker1farmer Bobtail Member

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    Dec 6, 2019
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    HeavyD I'm currently having a issue with my warn engine light going on and off and engaging the fan everytime any advice
     
  2. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    I always recommend to get your truck scanned and troubleshoot the code that is getting logged. You likely have a temp sensor faulting. The coolant temp sensor on your dash is the same the engine reads from, so if that is ok, it is probably the oil temp sensor. The oil temp sensor in the dash is different from the one the engine ecm reads from. So if you have an oil temp sensor and it reads fine, or you don't have that option, this is why. But as for now, you are chasing a ghost until you know what code is getting logged.
     
  3. trucker1farmer

    trucker1farmer Bobtail Member

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    Dec 6, 2019
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    HeavyD I'm wondering the purpose of the wire that goes past the reverse sensor on top the transmission it goes back a ways then ties together with a diode why? Wondering if I can't take it off and hook up a backup alarm? 9900i
     
  4. Heavyd

    Heavyd Road Train Member

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    I checked over a few diagrams and nothing is showing any diodes for that circuit. I don't ever recalling seeing diodes for that either. Check the wiring to see what colour it is and what number/letter it is. In my diagrams, the reverse light switch circuit deals with orange wires numbered 71 after the switch connector.
     
  5. trucker1farmer

    trucker1farmer Bobtail Member

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    1
    Dec 6, 2019
    0
    The wire that goes to the backup alarm continues past and gets connected together with a diode am wondering if I can't hookup backup alarm there?
     
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