Question about 1998 Jeep Cherokee

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How to fix a car horn f

It worked last week very weak. now it does not work at all

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Make sure its base ground is not rusty.
first. if yes, clean it.
if you have 12vdc a the horn, honked,
the horn or ground are bad.
if no, then the problem is backwards to relay or worse the air bag
clock spring in steering or horn button actual.
use a voltmeter and stop all guessing.

see page WRING , under your car.
see horn PDF page.? 40
see fuse 21? if bad or loose horn dies.
see that relay if bad or loose , it dies too.
pdf page 46
see that relay , and 2 horns.
my 99 had 2, does yours, Look?
if both are dead, experience says,
both would not go bad same day. so..
that means the relay is next. (easy to test and fix, unlike air bag dangers(ask)
see photo of relay
got 12vdc at 86/30 pins, key on?
yes, good, no backup from there.
then check pin 87, got 12vdc there honking?
yes, good no bad.
if no then we check pin 85.

pin 8v goes to 0v honking 12v before.
if not 12v before the coil in the relay is open, bad.
if wont go to 0v honking, the horn switch is bad. (or that expensive clock spring and the danger there)


Posted on Apr 29, 2015

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    _-__-___-_ Apr 29, 2015

    the relay.

  • _-__-___-_
    _-__-___-_ Apr 29, 2015


  • _-__-___-_
    _-__-___-_ Apr 29, 2015

    or is this a please guess question, as most are..... my guess is get it serviced?


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Replace it from any reliable auto parts dealer.

Posted on Apr 28, 2015

  • _-__-___-_
    _-__-___-_ Apr 29, 2015

    replace what? all wires, connectors, clock spring, horn button , relay or both horns, yes, it has 2. (guessing is fun?)



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