850 No reverse lights - PNP switch? No diag code (?)

Discussion in 'Volvo 850' started by Randy MacKenna, Jun 22, 2004.

  1. I have a 1997 850GLT, and the reverse lights have quit working.
    Sockets, bulbs and fuse are all good. I tried the 'cleaning' routine
    of shifting rapidly from P to L about 20 times -- still no reverse
    lights.

    Q1: If the PNP switch is bad, should I expect the check engine light
    to be on, and have a code available to read? I'm not getting any
    codes, and the performance/operation of the car is normal.

    Q2: Is it highly probable that the PNP switch is what I need to
    replace, given that my reverse lights are not working, and the
    bulbs/fuse check out okay?

    I just hate to go through the PNP switch replacement if it might end
    up not being the problem...

    Thanks,
    Randy
     
    Randy MacKenna, Jun 22, 2004
    #1
  2. Randy MacKenna

    Doug Warner Guest

    No, since the contacts that control the reversing light are probably
    separate from the ones the feed the TCU.
    Yes, at least in my 94, the PNP switch controls the reversing lights.


    You could short the correct two pins together in the harness connector
    for the PNP switch and see if the lights come on. Unfortuntely, I
    wouldn't trust the pinout to match for the 94, unless the switches are
    the same part #. If you can determine if it's the same, I can scan
    the page that shows the pins for you.



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    Doug Warner, Jun 23, 2004
    #2
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