Brake Switch (Cruise Control): Testing and Inspection

Before proceeding with electrical tests on, ensure all test equipment such as test lights and voltmeters are in good working order, inspect cruise control fuse and replace as necessary, inspect all vacuum hoses for leaks and check for adequate system vacuum.

On Vehicle
1. Turn ignition to On position and the instrument panel switch to On-Auto position.
2. Connect test light to suitable ground.
3. Probe brown wire at brake switch connector. Lamp should illuminate.
4. With probe still attached to brown wire, check switch adjustment. Light should go out when brake pedal is depressed 1/8 - 1/2 inch.
5. If lamp did not illuminate in step 3, probe wire in adjacent connector cavity.
6. If lamp illuminates, adjust or replace switch as necessary.
7. If lamp does not illuminate, repair wiring to switch.

Off Vehicle
Using self powered test lamp, lamp should be off with switch plunger extended, and should illuminate with switch plunger fully depressed.