I had a problem with the horn only working some of the time. (There's nothing like having a truck start to merge into you only to have your horn fail.) The first two or three times the dealer could not solve the problem. One time they replaced the wiring harness. Finally they worked with the Acura Tech Line and found that the horn was not properly grounded. It needed special conductive grease in the steering bearing. Here is their diagnosis:

"Filled upper steering bearing full of carbon conduction grease per Acura Tech Line."

The horn has worked perfectly for the last 10 days. I thought I would post this in case others have had the same problem.

 

Thanks, this has been happening to me for the last year or so. I'm sure other members will benefit from this info.

 

I hope this works .. I have been going back with the dealer on this for awhile now. Thanks.

 

where is this upper steering bearing? anyone has a picture or diagram of it. My horn stop fuse blew 3 times in last month and my honk and brake lights don't work