Question about 1996 Volvo 850

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Volvo 850 won't start occasionally

1996 volvo 850 will start fine and then 15 minutes later it won't start at all. No starter ingagement. Just dash lights. Wait a half hour and the thing will start right up. Battery is good.

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Hey Kolby!

Sounds like you've got an issue with your alarm module, causing the immobilizer to activate (also known as a "start inhibitor"). I'm not sure what type of alarm you've got, but this will probably help you find out if there is something wrong with it:

There is a panel with relays on it behind the dash. At the bottom of the steering column, by the drivers feet, there is a panel. Remove it to get access to the relay panel (just a couple of torx screws, no breakable clips as far as I can remember). Remove the "double size" relay (probably marked 210-211). Put a wire between the terminals 50E and 50F. This will hotwire the immobilizer and make sure that it always activates when turning the key.

Drive around with the wire in place instead of the relay for a while to see if this helps. If it does you'll know that the problem is related to the alarm system. Keep in mind that you will be without alarm and therefore probably also without remote central locking while doing this.
Make sure that the wire is connected firmly enough so it doesn't come loose. You can also put a fuse on it if it makes you sleep better at night ;)

Good luck!

Posted on Jun 27, 2009

  • Frankie L. Whited
    Frankie L. Whited May 31, 2016

    on my 1997 volvo 850 at the bottom of the steering column is the SRS system

  • Frankie L. Whited
    Frankie L. Whited May 31, 2016

    No relay panel there

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Posted on Jan 02, 2017

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