1988 740 turbo wiring diagram

Discussion in 'Volvo 740' started by strib1356, Apr 4, 2006.

  1. strib1356

    strib1356 Guest

    My 88 740 is not getting power to the fuel pump and I don't know where the relay is for the pump. I would like to know the location of the relay and if there iw womething else I should be looking for.
    strib1356, Apr 4, 2006
    1. Advertisements

  2. strib1356

    Jamie Guest

    The only relay I am familiar with on my 1987 740 GLE is located behind
    the fuse panel, under the radio. Remove the ashtray and you'll see the
    fuse panel. There should be a screw on the left that allows you to
    remove the fuse panel and then slide out the relay panel. The fuel pump
    relay I think is on the left rear, and is white and square.

    This is all from memory of reading other posts. I bought one on eBay
    for $15 to have a spare and plan on replacing mine soon as a

    You can carefully remove the white cover and inspect for cracks and
    resolder if necessary. I would suggest ordering the $15 deal on ebay.

    Again, I am not near my vehicle, but this is my recollection.
    Jamie, Apr 5, 2006
    1. Advertisements

  3. strib1356

    Jamie Guest

    Jamie, Apr 5, 2006
  4. strib1356

    Jamie Guest

    Jamie, Apr 5, 2006
  5. While on the subject, a long shot but easy to check:
    Feel the wires where they come out of the clamp on the positive post of the
    battery. The smaller red, brown or orange wire carries 12 volts to the ECU.
    If it corrodes in two - as sometimes happens - the fuel pump relay won't get
    power. If the wire survives a gentle tug you're okay, but if it falls apart
    when you touch it you may well have found the problem. (It took me a whole
    weekend to find it on mine, because the corrosion carried enough current to
    produce voltage at the ECU.)

    Michael Pardee, Apr 9, 2006
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.