Quote:
Originally Posted by Davey1984
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The reason I think the horn was on is due to water dripping through the upper part of the windshield, and either dripping into the steering wheel, also the floor was wet through too.
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that does sound like typical CEM issue caused by water ingress. Sunroof on your car, by any chance?
Disconnect battery, disconnect CEM, dry&check&clean connections, with some luck its just rusted connectors. fingers crossed
edit - alarm has its own internal battery, but it shouldnt have anything to do with horn itself. If horm was triggered by CEM, thats where problem starts. On the other hand - I am not sure if horn is actually routed trough CEM or there are just relays for it, nut regardless - starting issues and water on the floor = you have a problem and CEM is usually the first victim to fall :/