'94 850 Horn Ground wire

Discussion in 'Volvo 850' started by trent, May 1, 2007.

  1. trent

    trent Guest

    I have a 1994 850 whose horn would not stop blowing last night. I
    pulled over and took out the fuse as a temporary fix, unfortunately it
    seems that fuse also goes to the windshield wipers. After speaking
    with a friend he suggested I disconnect the ground wire for the horn
    to make it stop so I can use my windshield wipers. Problem is that
    friend could not tell me where the wire is, any insight? I just need
    a temporary fix until my car goes in for scheduled maintenance
    (timing belt, cv joints) at the end of the month. Seeing that I am in
    Chicago, it could rain any second so I need those wipers...

    trent, May 1, 2007
  2. trent

    Jarkka Guest

    Just pull out the connectors from each horn.
    Jarkka, May 2, 2007
  3. trent

    Mike F Guest

    Right. The horn is wired so that it always gets power (when the
    ignition is on) and is grounded by the switch on the steering wheel.
    There is a common problem on 850s where the insulator where this wire is
    protected from grounding on the hub of the steering wheel breaks,
    causing the horn to blow all the time. This 10 cent part is not
    available separately, the approved Volvo fix is a new steering wheel!
    Of course, an enterprising DIYer can fix this.

    Mike F.
    Thornhill (near Toronto), Ont.

    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
    Mike F, May 2, 2007
  4. You can get a kit from ipduse (http://www.ipdusa.com/Volvo-850/
    Electrical/Horn-Repair-Kit/p-72-154-548/) which has the plastic
    washers and contacts as well as a DVD showing how to replace it. I
    agree that the parts aren't worth the $69 that they charge, but the
    DVD was helpful so unless you can get the parts elsewhere, it may be
    worth the $69 to get the video.
    Mark from Geneva, May 2, 2007
  5. trent

    Glenn Klein Guest

    4 Screws needed Volvo Part #9157407-9 Reference Service Bulletin #
    64-802 if you can not get a copy I will post 1@ you send it or if anyone
    else needs a copy post back & I will post a link
    Glenn Klein, May 6, 2007
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