Door Lock Relay
- Remove and disconnect door lock relay. See DOOR LOCK RELAY under REMOVAL & INSTALLATION
. Using an ohmmeter, check resistance between door lock relay terminal No. 5 and terminals No. 2, 4, 7 and 9. See Fig 1
. All resistances should be 150-185 ohms.
- Check resistance between door lock relay terminal No. 6 and terminals No. 3, 8 and 12. See Fig 1
. All resistances should be less than 5 ohms. If all resistances are as specified, go to next step. If resistances are not as specified, replace door lock relay and retest system operation.
- Apply battery positive to relay terminal No. 5 and battery negative to relay terminal No. 1. Using a voltmeter, check voltage between ground and relay terminal No. 7. See Fig 1
. Apply battery positive to relay terminal No. 5 and battery negative to relay terminal No. 2. Check voltage between ground and relay terminal No. 6.
- Apply battery positive to relay terminal No. 5 and battery negative to relay terminal No. 3. Check voltage between ground and relay terminal No. 4. See Fig 1
. Apply battery positive to relay terminal No. 5 and battery negative to relay terminal No. 8. Check voltage between ground and relay terminal No. 9.
- Voltage in all tests should be more than 10 volts. If any voltage is not as specified, replace door lock relay and retest system operation. If all voltages are as specified, relay is functioning properly.
Courtesy of FORD MOTOR CO.