I have a 2002 Mistubishi Diamante. The horn will not work. I tested it with a direct battery connect and it did work. Fuse in the passenger compartment is good. Relay clicks when the horn is pushed. I replaced the relay with other ones from panel with the same result - relay clicking, but no horn function. I think one of the relay connections is to ground based on a continuity check. The horn is on the opposite side of the car from the relay. One of the wires at the horn has continuity back to the grounded relay terminal. The other horn wire does not have continuity to any of the four terminals on the horn relay. Is a wire broken, or should I expect the other wire at the horn to go somewhere other than the horn relay terminals?
Can anyone help me? Can you suggest other things to look at?
Thanks,
Rob
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rob hentges
Did the horn work before and all of a sudden just stopped? Did you have work done to the vehicle? Is the second wire a ground?
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Top Secret, I can tell you but then my wife will kill me.
One wire at the horn is connected to ground. I can't trace the other wire back to find out where it goes. The car was in a minor accident that damaged the right front bumper. I have a friend with his own dealer license. He bought the car for me at an extremely good price at the auto auction due to the damage. My friend fixed the cosmetic damage before selling the car to me.
Everything works in the car except the horn. Maybe someone could tell me which wire from the relay should go to the horn. Perhaps I just have a broken wire. I don't understand relays that much. Using a voltmeter, I see that one of the relay terminals is normally at 12V. When I press the horn on the steering wheel, this terminal voltage goes to zero..
Thanks,
Rob
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rob hentges
"When I press the horn on the steering wheel, this terminal voltage goes to zero.."
Horn wires will sit at 12volts until you push the horn when they will then get a ground signal which should trigger the relay and honk the horn. (So this wire is probably the one coming from the wheel. Should be grn/red or RED / wht from my info) Did you try the direct battery connect right at the horn itself or what? What you can do is match the wire at the relay and the wire at the horn itself and see if there is continuity between the two. This should show you if there is a break in the wire somewhere between there. Also if you replaced the relay and it is clicking when you push the horn, check to see if after it clicks it sends 12 volts to the wire going out to the horn. (You'll have to hold the horn down to test this) If so, then the relay is functioning properly and that would cross out any fuse issues. Since you say the relay does click then that would mean the break isn't between the steering wheel and the relay, probably leaving you only with a break from the relay to the horn. Might want to try taking a jumper wire (long wire..) and going from the relay terminal that GETS 12volts when the horn is pushed (should be terminal 87 or 30) and run that right to the other wire on the horn and see if it works then. That would probably be the easiest thing to do to.
"One of the wires at the horn has continuity back to the grounded relay terminal"
It may have continuity but that doesn't mean it runs back to the relay or anything, might just be grounded somewhere. As I'm sure you know a horn is pretty simple just power and ground so one side has to be grounded and the other needs 12v for it to sound.
Just rambling and throwing out some suggestions as to where I would start good luck hopefully you can figure it out. Good luck,
Mike
It sounds like there is a wire not hooked up properly, either at the relay, or not makeing a complete circuit (going open or to ground). In your first post you said you have continuity in the line between the horn and the relay, is this the case? Check this wire, it sounds like the guilty party.
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Top Secret, I can tell you but then my wife will kill me.