1998 Buick Lesabre LeSabre horn

1998 BUICK LESABRE
154,000 MILES • 3.8L • 6 CYL • AUTOMATIC
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ARKH4M
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I have bought a pre-owned 1998 Buick LeSabre Custom, everything works properly on it, only concern is the horn. The horn works when in panic mode or when I hit the automatic lock button. It does not however work in the steering wheel portion. Supposedly the man at the auto sales place has looked into the problem and couldn't figure it out. Any idea on what it could be or how I can fix this?
Jun 3, 2014 at 5:15 PM
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JACOBANDNICKOLAS
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How do you get it to work in a panic situation? Also, the door lock switch beeps the horn? Was this vehicle inspected when you purchased it? By law, they have to disclose potential hazardous problems before it can be sold. Were you made aware of the problem?
Jun 3, 2014 at 5:46 PM
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ARKH4M
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I hit the panic key on my remote that unlocks the door, when I bought the car I was notified about the horn issue, I'm not quite sure about the inspection, but I was warned, even the mechanic on site at the auto dealer said he couldn't figure it out either.
Jun 3, 2014 at 6:59 PM
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JACOBANDNICKOLAS
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The horn circuit isn't anything that complicated. You have the switch (in the steering wheel) a relay, a power supply and a horn that beeps when the circuit is closed. What components did the mechanic test?
Jun 4, 2014 at 5:50 AM
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ARKH4M
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Not quite sure, frankly im not sure he even worked on it or if he's even that good of a mechanic. Auto dealers arent the most reliable people you know? Haha.
Jun 4, 2014 at 5:54 AM
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JACOBANDNICKOLAS
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I understand. If I find you a schematic of the horn circuit, can you check things? Do you have a multi meter / volt meter to check electrical circuits?
Jun 4, 2014 at 6:01 AM
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ARKH4M
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Yes, I can check them, a schematic would be excellent!
Jun 4, 2014 at 6:03 AM
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JACOBANDNICKOLAS
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I tried to copy the schematic, but the program won't let me do it. I can, however, offer guidance if you are working on it.

See image below. This is what it gave me when I downloaded it.
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Jun 4, 2014 at 8:57 AM