Pretty sure that the relay would not operate if the fuse was blown. Since the horn works, I'd suspect wiring between relay and horn. I take it there is no voltage at the horn when the relay operates?
all of a sudden last night walst playing a tune with my horn, funny as it sounds!
my horn has now suddenly stopped working all together, i have checked what fuses i think are related to it and u can hear the relay clicking when pushing the horn but yet no horn, i have taken one of the horns off and tested it on a battery and all seems fine!? this is driving me mad! hopefully someone can help me.......
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Pretty sure that the relay would not operate if the fuse was blown. Since the horn works, I'd suspect wiring between relay and horn. I take it there is no voltage at the horn when the relay operates?
\'94 C220
Black.
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Chaos reigns within.
Reflect, repent, and reboot.
Order shall return.
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similar thing happened to mine... fuse was ok... at first i thought it was the relay.. so i bought one... it still didn't work... after more research i replaced the clockspring and it fixed the horn issue...
edit:
I see you tested the horn. Maybe Wichi is correct in thinking the clockspring. Or, maybe the relay is arcing and failing, not passing a full 12 volts under load.
Sometimes those old electrical horns just overheat and die. Put a meter across the leads, and have someone press the horn with the key on. If you get 12 volts, the horn(s) may be the issue.
Last edited by nhmercracer; 10-17-2011 at 05:29 PM.
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Thanks for you tips, iv fixed it this morning with a dropped wire from the relay! grr Happy days
where to obtain a cop siren horn?
my old man had a police siren on his car when I was a kid, it was very coooool.