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Posted on Jan 02, 2017
In the PCM is where the Horn Relay is. It's location should be annotated on the underside of the cover you pulled off to gain access. One way to determine if it is the Relay or not is to find a similiar Relay (shape and size) and switch them. If this fixes the Horn problem it is the Relay and should be replaced.
Posted on Dec 21, 2009
sounds like a broken timing belt,timing belts like to break during engine cranking and engine shut down. there are inspection holes in the timing cover,if you can't determine, remove top half of timing cover and check belt for slap,if there's slap,it's broke.
Posted on Jan 21, 2010
There are a few possibilities:
First of all, don't use the factory alarm. If the problem disappears, then the alarm is causing the horn to activate.
If that doesn't help, then verify the horn switch itself. Probably best to have your dealer do this because it's very close to the airbag.
If it's not that, then it may be the dreaded BCM starting to fail. The BCM, or "Body Control Module" is a dealer only component.
Posted on Feb 11, 2010
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