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.

Fig 1: Identifying Wiper/Washer Switch 8P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

WIRE AND TEST CONDITION CHART

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
3	BLK	Under all conditions	Measure the voltage to ground: There should be less than 0.5 V.	Poor ground (G601) An open in the wire
8	WHT/RED	Under all conditions	Measure the 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)	Measure the 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	Disconnect driver's under-dash fuse/relay box X (39P) and combination switch control unit connectors	Check for continuity between No. 4 terminal and driver's under-dash fuse/relay box connector X (39P) No. 27 terminal: There should be continuity.	An open in the wire
4	LT GRN		Check for continuity between the No. 4 terminal and body ground: There should be no continuity.	A short to ground in the wire