Initial Inspection and Diagnostic Overview

Start Diagnostics Here
Perform the checks listed below before consulting the Diagnostic Charts.

1. Check for open in the Horn Fuse.

2. Check for power to the Horn Fuse by noting normal operation of the Courtesy Lamps.

NOTE: If the vehicle is equipped with the Passive Keyless Entry/Security System, refer to Passive Keyless Entry/Security System. Antitheft and Alarm Systems

^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity or voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).

^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.

SYSTEM DIAGNOSIS
Refer to Diagnostic Charts for troubleshooting procedures.