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Wiper Relays

WARNING: This page is about a different car, the 1997 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Same test procedure may be used for all wiper/washer system relays.
  1. Remove relay to be tested. Wiper relays are located in engine compartment power distribution center. Measure resistance between relay terminal No. 5 and all other terminals. See WIRING DIAGRAM  . If resistance is 5 ohms or less between relay terminal No. 5 and any other terminal, replace relay. If all resistances are more than 5 ohms, go to next step.
  2. Measure resistance between relay terminals No. 3 and 4. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace relay.
  3. Connect a jumper wire between positive battery terminal and relay terminal No. 1. Connect another jumper wire between negative battery terminal and relay terminal No. 2. Measure voltage between ground and relay terminal No. 3. If battery voltage is not present, replace relay. If battery voltage is present, relay is okay.
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