Combination Switch Control Unit Input Test
- Remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
- Disconnect the 8P connector from the wiper/washer switch.
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 4.
- Reconnect the connector to the control unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the combination switch control unit must be faulty, replace the wiper/washer switch.
POSSIBLE CAUSECavity Wire Test condition Test: Desired result Possible cause if result is not obtained 3 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. - Poor ground (G601)
- An open in the wire
8 WHT/RED Under all conditions Check for voltage to ground: There should be battery voltage. - Blown No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
7 YEL Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. - Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
4 LT GRN Under all conditions Check for continuity between No. 4 terminal and the driver's under-dash fuse/relay box connector X (39P) No. 27 terminal:
There should be continuity.An open in the wire