Quote:
Originally Posted by 1990C4S
Since you just posted that the horn works, it is really unlikely that the relay or the horn are the issue.
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They could both be happening, iirc.
1). Internally: The relay
control circuit goes from the battery, to the fuse box(??), through the wheel switch, through the relay, back to chassis ground.
(not necessarily in that order)
2). Inside the relay are very fine windings to pull in the sprung bar, which closes the contacts for the load circuit.
All those small fine windings are a perfect place for a
KEY-OFF short.
I had a fuel pump relay get too hot for restart and then randomly cut out while driving.
3). The
load circuit(fat wire) just goes from battery, to fuse, to relay, to horn, back to ground.
Open/Close. Simple circuit.
I dunno. It's a easy check to eliminate from the search.
If you pull the horn relay, I wonder what the voltage numbers are in the contacts?
(Use a small spade connector and a double alligator clamp wire.)
Downstream shouldn't have any volts back-feeding into the circuit.