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Derrick, ASE Certified Technician
Category: Car
Satisfied Customers: 923
Experience:  A.S.-Automotive Analysis A6-Electrical A8/L1-Engine Performance Cert., CA Chrysler/Jeep/Dodge Tech
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Jeep Grand Cherokee: cause the Horn / Alarm

Resolved Question:

What will cause the Horn / Alarm on a ''01 Jeep Grand Cherokee to "blow" for no apparent reason ?
Submitted: 9 years ago.
Category: Car
Expert:  Derrick replied 9 years ago.

Hi there,

Any short to power in the system can cause the horn to blow or the horn relay to energize which would cause the horn to blow.

Below is the wiring diagram for the horn circuit.

The BCM(Body Control Module) is part of the vehicle security alarm.

Also, I would look at the clockspring as a possible suspect, Chrysler has never built a good clockspring.

Here is the diagram:


I hope this helps!

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