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Home >> Lexus >> 1997 >> LX 450 L6-4.5L (1FZ-FE) >> Repair and Diagnosis >> Wiper and Washer Systems >> Wiper Relay >> Testing and Inspection
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Wiper Relay: Testing and Inspection






1. INSPECT REAR WIPER 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 REAR WIPER 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 REAR WIPER 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.

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