Ford Mustang: Where oh where is the horn relay on 84 Mustang

Around 8/8/2003 8:00 PM, John Welch spake thusly:
 

According to the wiring diagram in my Haynes, there is no relay, which
would be a good reason why you can't find it.

<http://www.v6stang.com/wiring/04_Exterior-Lighting-SM.gif>
Anyway, looking at the diagram, power comes in from the power
distribution (3rd line down from the top left corner of the diagram,
labeled "Power Distribution Fuse Panel F-16"), goes through the that
mess of a multi-function switch in the left center of the diagram, and
then goes directly to the high pitched (and only) horn in the lower left
hand corner.

I'm assuming you checked the fuse...


That leaves one of three things that I can think of: Bad horn switch,
bad horn wiring, or bad horn itself (including a bad ground at the
horn). I'm guessing it's the first one, because something similar
happened with mine. Those multi-function switches seem to only have a
lifespan of about 18-20 years.

I'd probably establish that the horn works first, and make sure that
it's being grounded properly (through it's mounting stud). Then I'd pull
the multi-function switch assembly, find the right pins, and check for
continuity when you honk the horn. If both of the above seem to work,
you've got a short somewhere else in the wire, and it'll take a bit more
effort to hunt it down.


--
~/Garth - '83 GL V6stang Hatch <Former MW #7>
My V6stang: http://www.v6stang.com/v6stang
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"Garth Almgren" <com> wrote in message
news:com... 

Just FYI... on the 1984 models, they moved the horn back to the steering
wheel as opposed to the multi-function switch. Seemed too many people were
having problems finding the horn in an emergency situation.

I'd guess bad horn. I've had a few of those die.

On these cars, the horn/cigar lighter/cruise (if applicable) are all tied
together on one fuse. I'd check that just out of a whim... but as far as I
know, you're right about the lack of horn relay.

JS