Wiper Control Relay: Inspection

WARNING: This page is about a different car, the 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the connector from the 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 negative lead to ground.

Fig 1: Connecting Power & Voltmeter For Wiper Control Relay Inspection
Courtesy of SUBARU OF AMERICA, INC.
Measure the voltage when the wiper relay is operated.

Fig 2: Wiper Relay Position/Voltage Chart
Courtesy of SUBARU OF AMERICA, INC.

If operation is not as specified, replace the switch.