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Old 08-29-2010, 12:31 PM
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What is likely the problem with my horn?

I'm bringing a some what older car (91 Chrysler Lebaron) back to life. My current item on the "To Fix" list is a horn that sounds like it's been castrated. It works but sounds very anemic. I first thought the horn was the problem and traded it for a different horn. That horn pretty much did the same thing.

Do horns have some sort of capacitor built into their design system or something else along those lines that I should be concentrating on rather than the horn it's self?

FYI: All parts on the Lebaron are otherwise stock.

All input is appreciated.

Thanks,
Roach

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Old 08-29-2010, 01:18 PM
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The battery must be fully charged.
Most cars have (2) horns wired in parallel. One may be bad and affecting the good horn.
Disconnect all wires connected to the terminal studs of the horns but leave them mounted in the car for a test to see if they are grounded.

With jumper wire connect one end to each horn terminal stud and the other end to the battery + terminal one at a time to see if both horns work. Horns will sound different. One will be the high note and the other a low note.

Make sure there is a good ground path to the chassis.

If the horns sound OK only other thing that could be problem is the horn relay which is usually located on the fuse block.

vicrod
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Old 08-29-2010, 05:38 PM
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Vicrod,

Thanks for the reply. At this time I've only located one single horn and like the big dummy that I am have pretty much disconnected and destroyed the plug terminal in an attempt to connect the replacement horn that I pulled from the junk yard. I didn't realize that most cars had 2 horns so I'll have to back track and cover that ground as well. I believe I've created a new problem in the mean while. My front passengers side blinker that I just got working a week ago is now out of commision.. . I think from tugging on the brittle wires of this old car.

Any how thanks for the response.

I have a 12 volt batter charger readily available. Can I test the horns with that to ensure that they're working do you think? At least I can rule out the horns as the problem if that method will work to test the horns.

I'll have to look into that relay and take a close look for a second horn.




Roach
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Old 08-30-2010, 01:49 PM
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If the charger will supply the necessary current (~6A-8A), you can test the horns using it, but it would seem to me to be as easy to use the battery. Ground the horn's bracket to the negative terminal, use a jumper to the positive battery terminal to the horn "+" terminal.

Maybe 1/2 the vehicles had just one horn, so don't go crazy looking for something that may not be there.
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Old 08-31-2010, 07:59 PM
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Well I went and did it now.

After no success with the horn and noticing that my front passengers side signal is no longer working I've noticed that the headlight is way down on brightness. It's working but just barely.

I tell ya this car is 2 steps forward and one step back with every thing I get into on it.

So now my horn isn't working, my passengers side front signal no longer works, and the passengers side headlight is barely limping along.

Roach
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Old 08-31-2010, 09:21 PM
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Quote:
Originally Posted by roach4047
Well I went and did it now.

After no success with the horn and noticing that my front passengers side signal is no longer working I've noticed that the headlight is way down on brightness. It's working but just barely.

I tell ya this car is 2 steps forward and one step back with every thing I get into on it.

So now my horn isn't working, my passengers side front signal no longer works, and the passengers side headlight is barely limping along.

Roach
You have a ground problem w/the headlight, almost certainly- if the other side is normal.
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Old 09-01-2010, 01:27 PM
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Thanks,

I'll be looking into things over the next couple of days to see if I can figure out what's going on. I'll post my findings once I come up with something.

Roach
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