Car Getting Horny....

[Dano58]

My son mentioned going out the door this am, that his car horn was beeping while he was driving last night. It didn't seem to do it when he was stopped, just while driving! Any thoughts on what might cause this?

Car is a 1999 Impreza 2.5 RS 5-speed.

Dan D
'99 Impreza 2.5 RS (son's)
Central NJ USA

 

[weelliott]

My son mentioned going out the door this am, that his car horn was beeping while he was driving last night. It didn't seem to do it when he was stopped, just while driving! Any thoughts on what might cause this?

Car is a 1999 Impreza 2.5 RS 5-speed.

Dan D
'99 Impreza 2.5 RS (son's)
Central NJ USA

Could be a loose wire in the steering column. I am not familiar with the horn wiring in the subies, but I know in a honda I used to own the flow of juice was battery positive, fuse, horn, horn button on steering wheel, ground. So if there were a short in that wire between the horn and the switch, it would activate the horn. I'd suggest finding a wiring diagram of the system. It wouldn't necessarily be in the steering column. I theorize that it is bouncing around and intermittently contacting while driving, but when stopped the lack of vibration prevents contact. Just a theory. I'm not even sure how the horns are wired--if the juice goes to the horn or the switch first. If it goes to the switch first, my theory falls apart.

Another theory is that it is a mechanical relay going bad with a defective return spring.

Just thoughts,
Bill