I stuck an ohmmeter on the connections leading to my horn with the key turned with the battery on....no movement on the meter so I guess I have no power goin to the horn.Its a 93 245 so it has an airbag,so when I disconnect the bag ,disconnect battery cable look into the steering wheel hopefully I will see a loose connection??If not what else could it be...also is a 15 yr old airbag never used still good??Never took a steering wheel apart before. :liebe011:

Have you checked fuse #2?

yes,also with the key turned on I had someone press the horn while I checked the meter,no movement...

The yellow wire on the horn is the 12V from fuse #2. The black wire is grounded through the horn switch.

Being of limited mechanical know how ,did I do this right? zero out the meter stick the red prong on yellow and black on groundturn ignition on press horn if there is current going to horn should it read 12v?can i put black prong to carbody also?

With the red probe on the yellow wire and the black probe on the fender or negitive battery terminal, you should have 12V with the key on. If you do, run a jumper wire from the negitive battery terminal to the black wire on the horn - if you hear the horn its most likely a problem with the horn switch.


I wouldn't mess with the airbag - very dangerous.

Thanks :liebe011:

You mentioned "ohmmeter" and "zero out the meter." Just so we're on the same page, you should not use an ohmmeter on an energized circuit. What you should use is the voltmeter. You probably already know this but I wanted to clear up any possible misstatement.

Well spotted, Bruce. I missed that one. I hate smoking meter movements.

I'd take the horn off and check it out to ensure it is working.

It's a real PITA spending the time and energy chasing around a wiring circuit looking for faults and you realise it has been a complete wild goose chase simply because nobody thought to check the horn unit itself to verify whether it had packed it in or not.

If the horn unit is O.K then start looking into the circuit as it's much quicker to establish if the horn works, before trying to find if there are any gremlins in the wiring.

Put the cart before the horse - not after it.

Well the horn works,I jumped to the battery blows fine..........so I called the dealer about a horn switch.They call it horn switch plate and it is an Unservicable part!Service dept said even if I disconnect the battery and disconnect air bag to see if I have a loose or fried wire in Steer wheel it could inflate just from body static .I can't beleive one would have to replace steering wheel to get a horn to work!!! Help !need an inspection sticker (: Anyone rig up a bypass horn?

You could put another push button type switch on the dash ...

Right after lunch this afternoon my buddy at work mentioned the same idea :liebe011: What would a volvo mechanic do to make goin in to the airbag area to check horn wiring safe ?

Funny how in my state all that is required for a car to be legal to drive is at least 3 inflated tires. No inspections required. Oh, I think you might need a steering wheel also but you can probably get a waiver for that :thumbsup:

:grin: Your lucky here if there's dust on my bumper they fail it!!!

:thumbsup:

"Disconnect the negative battery cable. Get a T-30 or 40 socket (I beleive these sizes are correct) and remove the two bolts at the back of your steering wheel.[Where are these bolts?] You'll have to turn the wheels left and right to get at them. Remove the air bag/horn button.[How?] Remove the strap/plug from the air bag/horn button. Now take the four bolts out of the vertical metal contacts for the horn. One will have a black wire attached which will fit to the other contact when you switch them. While having these contacts removed, clean the little rivet parts of the contact with a small file, emery cloth, etc. Switch the metal vertical bar contacts. IMPORTANT NOTE: When reattaching the air bag/horn button, tighten the right side bolt first. There should be a placard reminding you of this as your working. Reattach the negative battery cable. Very simple operation. I repeated this on my 240 and both horns are very sensitive. This takes about ten minutes at the most".

nice instructions......what about the warning of the bag inflating due to body static the dealer warned me about.Are they being overly cautious or trying to get me in so they can do it at 80.00 /hr