Wiper Relay: Testing and Inspection

INSPECT REAR WIPER RELAY CONTINUITY
a. Check that no continuity exists between terminals 3 and 4.
b. Check that continuity exists between terminals 4 and 5. If continuity is not as specified, replace the relay.




INSPECT REAR WIPER RELAY OPERATION
a. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 6.
b. Connect the positive (+) lead from the voltmeter to terminal 5 and the negative (-) lead to terminal 6, check that the meter needle indicates 0 volts.
c. Connect the positive (+) lead from the voltmeter to terminal 4 and the negative (-) lead to terminal 6, check that the meter needle indicates battery positive voltage.
If operation is not as specified, replace the relay.




INSPECT REAR WIPER RELAY INTERMITTENT OPERATION
a. Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 2 more than 2 seconds.
b. Connect the positive (+) lead from the voltmeter to terminal 4 and the negative (-) lead to terminal 2.
c. After disconnecting the positive (+) lead from terminal 5 connect it to terminal 3, and than, check that the meter needle rises from 0 volts to battery positive voltage within 9 to 15 seconds.
If operation is not as specified, replace the relay.







INSPECT INSTRUMENT PANEL JUNCTION BLOCK CIRCUIT (Rear Wiper Relay)
a. Remove the instrument panel junction block.
b. Inspect the "A" connector on the instrument panel junction block back side, as shown in the chart.
c. Disconnect the "B" connector from the instrument panel junction block and inspect the connectors on the wire harness side, as shown in the chart.
If circuit is as specified, try replacing the relay with a new one. If the circuit is not as specified, inspect the circuit connected to other parts.




INT Position: INSPECT INSTRUMENT PANEL JUNCTION BLOCK OPERATION (Rear wiper relay)
a. Connect the positive (+) lead from the voltmeter to terminal C9 and the negative (-) lead to body ground.
b. Connect the negative (-) lead from the body ground to terminal A21.
If continuity is not as specified, replace the instrument panel junction block.




LO Position: INSPECT INSTRUMENT PANEL JUNCTION BLOCK OPERATION (Rear wiper relay)
a. Connect the positive (+) lead from the voltmeter to terminal C10 and the negative (-) lead to body ground.
b. Connect the negative (-) lead from the body ground to terminal A22.
If continuity is not as specified, replace the instrument panel junction block.