Troubleshooting Horn Problem

Scott wrote in news: snipped-for-privacy@drn.newsguy.com:

On most cars, the horn relay has three wires, one power wire coming in that should have +12V all the time, a thin wire that grounds the relay coil through the horn switch, and a wire going out to the horn. If yours is like this, you could try taking the relay out and using a short jumper to connect the power wire to the horn wire. The horn should blow. I suspect it will, which would mean your problem is in the other wire, the signal wire to the relay. Maybe it is disconnected where it attaches to your alarm system.

I actually did remove the relay and it has 4 contacts. I suspected one of them should be +12V all the time. I checked the voltage on the contacts and none of them have voltage. I was able to put +12V on the contact that goes to the horn and the horn blew. I didn't have a meter to test if the other contacts closed when I pushed on the steering wheel. But I am assuming the lack of voltage coming into the relay must be my problem. Not sure where to go from here other than the dealer, and I just want to make sure I am not missing anything obvious.

Thanks! Scott