Wipers/Washers Control Unit Input Test

Wipers/Washers Control Unit Input Test

1. Before testing, troubleshoot the multiplex control system. Multiplex Control System Troubleshooting

2. Remove the dashboard lower cover. Drivers Dashboard Lower Cover Removal/Installation

3. Disconnect under-dash fuse/relay box connectors B, F, G, J, X and Y.
NOTE: All connectors are shown from wire side of female terminals.

4. 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 are OK, go to step 5.

5. With the connectors still disconnected, do these input tests at the following connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.

- If all the input tests prove OK, go to step 6.





6. Reconnect the connectors, and do these input tests at the following connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.

- If all the input tests prove OK, the multiplex control unit must be faulty; replace the under-dash fuse/relay box assembly.