HORN SYSTEM


HORN SYSTEM TEST TABLE

CONDITION
  		 POSSIBLE CAUSE
  		 CORRECTION
  

HORN SOUNDS CONTINUOUSLY.

NOTE: IMMEDIATELY UNPLUG HORN AND RELAY IN THE JUNCTION BLOCK

 		 1. Inoperative horn relay.
  		 1. Replace relay, if inoperative
  
  2. Horn control circuit to relay shorted to ground.
  		 2. Check terminal 65 in tipm for continuity to ground indicates:
A. Wiring harness shorted to ground.
B. Find the short and repair as necessary.
  
  3. Pinched horn switch wire under driver airbag module.
  		 3. Replace horn switch.
  
  4. Inoperative horn switch
  		 4. Replace horn switch.
  

HORN SOUNDS INTERMITTENTLY AS THE STEERING WHEEL IS TURNED.

 		 1. Horn relay control circuit x3 is shorted to ground inside steering wheel.
  		 1. Remove driver airbag and check for rubbing or loose wire/connector, repair as necessary.
  
  2. Pinched horn switch wire under driver airbag.
  		 2. Replace horn switch.
  
  3. Inoperative horn switch.
  		 3. Replace horn switch.
  

HORN DOES NOT SOUND

 		 1. Check fuse 23 in the tipm.
  		 1. Replace fuse if inoperative.
  
  2. No voltage at horn relay terminals 62 & 66 and fuse is ok.
  		 2. No voltage, repair TIPM as necessary.
  
  3. Open circuit from terminal 65 of the relay to horn switch x3 circuit.
  		 3. Repair circuit as necessary.
  
  4. Inoperative or damaged horn.
  		 4. Voltage at horn when horn switch is pressed, replace horn.
  
  5. Inoperative horn switch
  		 5. Replace horn switch.
  

FUSE BLOWS WHEN HORN IS BLOWN

 		 1. Short circuit in horn or horn wiring
  		 1. Remove horn relay, check for shorted horn or horn wiring. Disconnect horn wire harness to isolate short and repair as necessary.
 

FUSE BLOWS WITHOUT BLOWING HORN

 		 1. Short circuit
  		 1. Remove relay, install new fuse, if fuse does not blow replace horn relay. If fuse blows with relay removed, check for short to ground with ohmmeter between terminals 62 & 66 and the fuse terminal. Repair as necessary.
  

NOTE: FOR WIRING REPAIRS REFER TO GROUP 8W, WIRE DIAGRAMS.