Initial Inspection and Diagnostic Overview

DIAGNOSIS AND TESTING - HORN SYSTEM

WARNING: Disable the airbag system before attempting any steering wheel, steering column, seat belt tensioner, side airbag or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable. Wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury.

In most cases, any problem involving continually sounding horns can be quickly alleviated by removing the fuses from the Totally Integrated Power Module (TIPM).

The most reliable, efficient and accurate means to diagnose the horn system requires the use of a scan tool and the proper diagnostic procedure information. Refer to wiring for the appropriate information.

HORN SYSTEM TEST TABLE