Question about 2000 Volvo S40

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S 40 1998

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  • lgauto Jan 28, 2009



  • Patrick Dennehy May 11, 2010

    Ok, if relay operation is correct as you say, does that mean it kicks on and sends out a signal? I'd check and see if my voltage drop wasn't occuring right there in the relay. It could be triggering properly, but still not providing ample supply.

    If that measurement looks good, look for gummy bears and dried up Dr.Pepper in the floorboard from the Rugrats. Was the car ever appropriated for transporting Rugrats???

    You're not shorting directly to ground, but you have spotted a voltage drop. Make sure you trace it from the front to the back. That means starting at the fuse, then relay, then wiring, then floor wiring, and the point you've measured low voltage. Measurements are never believable unless you and others can reproduce them.

    Let me know what's up.

    Let's fix this. Tater Todd

  • Patrick Dennehy May 11, 2010

    If you've arrived at that conclusion, please tell me how you got there. Just a little more detail if you can. Thanks. TT



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Where is the relay located?

Posted on Oct 24, 2010


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I personally like to backprobe the power wire to the fuel pump (large purple wire) as close to the fuel pump as possible and with the fuel pump connector plugged in. This will tell me three things.

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