Wiper Relay: Testing and Inspection

Front/Rear Wiper Relay







1. Check break contact.
^ Measure the resistance between pin 3 and 4.
^ Is the resistance less than 1 ohm?
^ If yes, GO to step 2.
^ If no, INSTALL a new relay.







2. Check make contact.
^ Measure the resistance between pin 3 and pin 5.
^ Is the resistance greater than 10 kohm?
^ If yes, GO to step 3.
^ If no, INSTALL a new relay.







3. Check relay contact in activated condition.
^ Connect the positive terminal of the power supply with pin 1.
^ Connect the negative terminal of the power supply with pin 2.
^ Measure the resistance between pin 3 and pin 5.
^ Does the relay switch audibly and is the resistance less than 1 ohm?
^ If yes, the relay is OK.
^ If no, INSTALL a new relay.