My horns have stopped working. They had working fine when I put in the new
wiring harness five years ago.
I started troubleshooting last night, and found that I do have 12 V going to
the one terminal to each of the horns. Unfortunately I have 12 V going to the
other terminals too!
There must be a short somewhere, but my battery doesn't go dead all the time.
That's fine.
I did a little more experimenting. I disconnected one of the leads from the
horn (the purple and black wire that is supposed to be grounded). Then I took
a jumper wire with alligator clips, and ran it from the free tab on the horn
to a true ground. The horn worked fine! Toot, toot ! I repeated this on the
other horn, it worked too. Toot, toot.
Then I took off the horn switch on the steering wheel, measured the incoming
voltage, checked that the metal steering column was Zero volts, and checked
the operation of the switch, nothing wrong there.
It seems like the ground path is going hot, but the battery isn't going flat.
Puzzling.
Any suggestions?
Will Daehler
63 TR4 Powder Blue
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