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Thread: All dash light on except srs and check engine??

  1. #1
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    All dash light on except srs and check engine??

    Hi guys car runs fine no limp mode just all lights on except SRS and check it
    Car drives fine
    wgat can this be ?
    thanks
    E74340DE1-FE53-47F7-8CD0-7F0CE7C526F9.jpegrick

  2. #2
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    Re: All dash light on except srs and check engine??

    Quick update
    I put a voltmeter on car and alternator is not charging

  3. #3
    .036 Hoonigan™
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    Re: All dash light on except srs and check engine??

    Usually it's a failed voltage regulator... that can be a quick fix, you MAY be able to change the VR with the alternator on the car. Replacing the alternator isn't fun, you need to either remove the fan+clutch, or drop the sway bar (edit: or, disconnect the SLS hose to make room, per Derf's HOW-TO linked below).

    https://www.500eboard.com/forums/showthread.php?t=9536

    https://www.500eboard.com/forums/showthread.php?t=4752

    Bummer!

    Dave M.
    1997 E420 (Bugeyes)
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    samiam44 (3 Weeks Ago)

  5. #4
    E500E Guru nocfn's Avatar
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    Re: All dash light on except srs and check engine??

    Don't forget, no matter what: DISCONNECT YOUR BATTERY OR YOU WILL WELD YOUR TOOLS TO THE CHASSIS.

    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
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  6. #5
    E500E Guru
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    Re: All dash light on except srs and check engine??

    Lower harness can short out and fry the alternator main feed.

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    gsxr (3 Weeks Ago)

  8. #6
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    Re: All dash light on except srs and check engine??

    Took the belly pan off and the regulator wire was bare and stuck to the oil preasure one
    time for lower harness rebuilt
    can I reuse all connectors or need to order new ones?
    thanks

  9. #7
    .036 Hoonigan™
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    Re: All dash light on except srs and check engine??

    I wouldn't attempt to rebuild the lower harness unless you are proficient with electrical work, AND have access to high-temp wire & heat shielding. Some of the connector housings are NLA.

    Jono at Blue Ridge MB is the only place I know of that is professionally rebuilding these (with high-temp wire & heat shield) since the harnesses went NLA from MB:

    http://blueridgemb.com/child/contact.htm


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