Cruise Control Switch: Testing and Inspection

Fig. 1 Control Unit Harness Connector Terminal Identification:

1. Connect multimeter US 1119, or equivalent, between control unit harness electrical connector terminal 1 and ground, refer to Fig. 1.
2. Switch cruise control main switch to the On position.
3. If circuit is open, replace defective steering column switch.
4. If circuit shows continuity, move switch slightly toward the Off position, but do not turn off.
5. If circuit is open, replace steering column cruise control switch.
6. If circuit shows continuity, connect multimeter between control unit harness connector terminal 3 and ground.
7. Switch steering column cruise control switch On and Off.
8. If value remained constant, replace defective steering column switch.
9. If reading shows continuity when On and open when Off, switch cruise control main switch to the On position.
10. Move switch slightly to the Off position, but do not turn switch Off.
11. If zero continuity, replace defective steering column switch.
12. If circuit is open, connect multimeter between control unit harness connector terminal 6 and ground.
13. Push switch to the Resume position.
14. If circuit is open, replace defective steering column switch.
15. If circuit shows continuity, connect control unit harness connector between terminal 3 and ground.
16. Push switch to the Resume position.
17. If circuit is open, replace defective steering column switch.
18. If circuit shows continuity, connect multimeter between control unit harness connector terminal 2 and ground.
19. Press the Set switch. If circuit shows continuity, refer to VACUUM PUMP CHECK.
20. If circuit is open, replace defective steering column switch.