Wiper Control Relay (Wagon Model): Inspection

WARNING: This page is about a different car, the 2004 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the connector from wiper control relay.
Connect the positive (+) lead from the battery to terminal 8 and the negative (-) lead to terminal 6. Connect the positive (+) lead from the voltmeter to terminal 3 and the negative (-) lead to ground.

Fig 1: Connecting Positive Lead From Battery To Terminal 8 And Negative Lead To Terminal 6
Courtesy of SUBARU OF AMERICA, INC.
Measure the voltage when the wiper relay is operated.

Fig 2: Identifying Voltage Display

Courtesy of SUBARU OF AMERICA, INC.

If operation is not as specified, replace the switch.