horn not working...

[steve bain]

so i have sorted all electrical gremlins except this one!

when i press the horn the relay clicks but no sound.
if i put negative and live directly to horn it works and honks so thats fine!
fuse is fine, but if i remove it relay won't click so assume that works
assume relay works as it clicks.
so the fault must be between the relay and horn.

the horn has a brown wire and a black with yellow lines. i have replaced both ends with new terminals.
i assume (and maybe wrong) that the brown is earth and black/yellow is the switched live triggered by the relay
i cannot get continuity between the brown and earth
i cannot get continuity between the black/yellow and the relay terminals.
its like there is a plug somewhere that needs plugging back in


any ideas? the horn stopped working 5 years ago....so may or may not be due to me messing about in the engine recently

[duggers]

Have you checked for voltage at the multi connector at the back of the fuse board when the horn is pushed?
I believe it is connection C15 black/yellow wire. In theory if the earth is good you should get 12v showing when the horn is pressed.
Black/brown wires are links to earth (brown).

First off I would try a known good relay, always start simple you'd be amazed how many hours you can spend trying to find a fault when you assume a component is good, ask me how i know :)

[mazellann]

Theres an earth wire on the steering rack in the engine compartment, mine horn stopped working when that snapped?
Worth checking

[steve bain]

All sorted now thanks. Turned out I had a fuse missing after all that! Must have borrowed it years ago and forgot!