HELP! How do I test the two-tone horn RELAY?

[lejolierogue]

Dear enthusiasts,

I've been having horn problems and am using the process of elimination to find the culprit. Thus far, I've replaced the air-bag retaining frame. I also found and replaced a blown fuse. Before I spend time removing the bumper and changing both the horns, I'd like to rule out the relay. I was told that if I do not hear "clicks" when I press on the airbag, then it is the relay problem. However, I did not press on the airbag when I opened up the steering and I've returned the tools. Therefore, is there any other way to test the relay? I understand that the location of the relay is under the front dash. Can I simply pull another one out and swap it with the horn relay? Or is there another way to hear the clicking sound besides pressing on the airbag?

Please advise and thanks in advance.