Control Unit Input Test: Windshield

1. Before testing the wiper/washer control functions, troubleshoot the multiplex control system (see TROUBLESHOOTING ).

Driver's Multiplex Control Unit 

1. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box, and disconnect its connector.
2. Inspect all connector and socket terminals to be sure they are 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.
   Fig 1: Identifying The Driver's Multiplex Control Unit 24P Connector A Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 2: Identifying The Driver's Multiplex Control Unit 22P Connector B Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. With the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's under-dash fuse/relay box sockets.
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, driver's multiplex control unit must be faulty; replace it.
   Fig 3: Control Unit Input Test Table (Windshield)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.