Hi all. I have a 2008 IS250. Lately when I go over bumps in the road, out of nowhere my horn will start beeping. In order to make it stop, I have to blow the horn from the steering wheel. Any ideas where to begin looking? Thanks!

 

To begin isolating the problem, remove the horn relay and see if it quits.

 

Has your vehicle been in a front-end collision ever OR have you ever had airbag or steering wheel work done to your vehicle?