Test B: The Horn Is Always On

PINPOINT TEST B: THE HORN IS ALWAYS ON

Normal Operation
The battery junction box (BJB) supplies the switched and control voltage to the horn relay (part of the smart junction box [SJB]) through circuit SBB02 (YE/RD). When the horn switches (part of the steering wheel) are pressed, the horn relay is grounded through the horn switch circuitry, energizing the horn relay. The horn relay then sends voltage to the horn through circuit CBP05 (YE), sounding the horn. Ground for the horn is supplied through circuit GD123 (BK/GY).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Clockspring
- Horn switches (part of the steering wheel)
- SJB

B1-B3:

B3-B5:

B5-B6: