Combination Switch Control Module Input Test

Combination Switch Control Module Input Test

1.	Remove the steering column covers.

2.	Disconnect the 8P connector from the wiper/washer switch (LHD type) or combination light switch (RHD type). BLKYELWHTLT BLUCOMBINATION SWITCH CONTROL MODULE CONNECTOR (8P)Wire side of female terminals

3.	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 4.

4.

With the control unit still disconnected, 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. Cavity  Wire  Test condition  Test: Desired result  Possible cause if result is not obtained  3  BLK  Under all conditions  Check for continuity to ground: There should be continuity.  Poor ground (G501, G601) An open in the wire   8  WHT  Under all conditions  Check for voltage to ground: There should be battery voltage.  Blown No. 7 (10A) fuse in the 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 (7.5A) fuse in the under-dash fuse/relay box An open in the wire   4  LT BLU  Under all conditions  Check for continuity between terminal 4 and the under-dash fuse/relay box connector X (39P) connector terminal No. 27: There should be continuity.  An open in the wire   Under-dash fuse/relay box connector X (39P) connector disconnected  Check for continuity to ground: There should be no continuity.  Short to ground