Wiper Relay: Testing and Inspection

FRONT WIPER RELAY INSPECTION

1. INSPECT INTERMITTENT WIPER OPERATION







a. Turn the wiper switch to INT position.
b. Turn the intermittent time control switch to FAST position.
c. Connect the positive (+) lead from the battery to terminal B18 and the negative (-) lead to terminal B16.







d. Connect the positive (+) lead from the voltmeter to terminal B7 and the negative (-) lead to terminal B16, and check that the meter needle indicates battery positive voltage.
e. After connecting terminal B4 to terminal B18, connect B18 to terminal B16.







Then, check that the voltage rises from 0 volt to battery positive voltage within time as in the figure.

If operation is not as specified, replace the switch.








2. INSPECT WASHER LINKED OPERATION
a. Connect the positive (+) lead from the battery to terminal B18 and the negative (-) lead to terminal B16.
b. Connect the positive (+) lead from the voltmeter to terminal B7 and the negative (-) lead to terminal B16.







c. Push in the washer switch. Check that the voltage changes, as shown in the table.

If operation is not as specified, replace the switch.

REAR WIPER RELAY INSPECTION







1. INSPECT RELAY CONTINUITY
a. Check that there is no continuity between terminals 1 and 3.
b. Check that there is continuity between terminals 2 and 3.

If continuity is not as specified. replace the relay.







2. INSPECT RELAY OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 6.
b. Connect the positive (+) lead from the voltmeter to terminal 2 and the negative (-) lead to terminal 6, and check that the meter needle indicates to 0 V.
c. Connect the positive (+) lead from the voltmeter to terminal 3 and the negative (-) lead to terminal 6, and check that the meter needle indicates to battery positive voltage.

If operation is not as specified, replace the relay.







3. INSPECT RELAY INTERMITTENT OPERATION
a. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 4.
b. Connect the positive (+) lead from the voltmeter to terminal 3 and the negative (-) lead to terminal 4.
c. After disconnecting the positive (+) lead from terminal 2. connect it to terminal 1, and then, check that the meter needle rises from 0 V to battery positive voltage within 6 to 10 seconds.

If operation is not as specified, replace the relay.