Troubleshooting Hints

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Perform the Remote Function Actuator module Check in Keyless Entry before performing horn diagnosis. This system check will help determine if the Remote Function Actuator module is faulty, and if other circuits are malfunctioning. Keyless Entry
2. Test the horn function through the Remote Function Actuator (RFA) by using the key fob transmitter to lock and unlock the vehicle. The horn should pulse for each evolution.
3. Check HORN Fuse in the Underhood Junction Block. If open, check CKT 29 (DK GRN) for a short to ground.
4. Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.
5. Check for a broken (or partially broken) wire inside of insulation which could cause system malfunction but prove good in a continuity/voltage check with a system disconnected. (See Troubleshooting Procedures.) Diagnostic Aids