Tests AI
PINPOINT TEST AI: THE HORN IS INOPERATIVETest AI1-AI3:
Test AI3-AI4:
Test AI5-AI7:
Test AI7-AI8:
Test AI8-AI10:
Test AI10-AI11:
Normal Operation
The horn relay B+ power and the horn relay switched power is supplied to the central junction box (CJB) fuse 26 (20A) by circuit 1113 (YE/LG). The horn relay is controlled by ground circuit 1 (BD) through the vehicle security module and the horn switches. The horn relay is grounded through the horn switches by circuit 6 (YE/LG) and to the powertrain control module (PCM), circuit 848 (DG/OG). When the horn switch is pressed, the horn relay control circuit 6 (YE/LG) is grounded. The relay is then energized causing B+ voltage to be applied to circuit 1 (DB), enabling the horns to sound.
Possible Causes
- circuit 1 (DB) open
- circuit 6 (YE/LG) open
- circuit 57 (BK) open
- circuit 848 (DG/OG) open
- circuit 1113 (YE/LG) open
- horn relay
- horn
- clockspring
- horn switch
- PCM