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Home >> Mercury >> 1994 >> Capri Base, Automatic >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks - Power >> Testing >> System Test

System Test

  1. Inspect DOOR LOCK fuse. If fuse has failed, go to next step. If fuse is okay, go to step 4).
  2. Replace DOOR LOCK fuse. Turn ignition on. If fuse fails again, go to next step. If fuse does not fail, go to step 4).
  3. Turn ignition off. Unplug connectors from both door switches. Unplug connector from fuse panel. Inspect White/Green wire at fuse panel for short to ground. If wire is okay, go to next step. If wire is not okay, repair wire as necessary.
  4. Reconnect wiring to fuse panel if necessary. Unplug connectors from door switches. Turn ignition on. Check for battery voltage on White/Green wire at each door switch harness connector. If battery voltage exists, go to next step. If voltage is not as specified, repair White/Green wire as necessary.
  5. Turn ignition off. Measure resistance between Black wire and ground at each switch harness connector. If resistance is less than 5 ohms for each wire, go to next step. Repair appropriate Black wire if resistance is not as specified.
  6. Unplug left door lock switch. Measure resistance between Pink/Light Green wire terminal on switch and specified wire terminals, then repeat with Pink/Yellow wire terminal. See Fig 1 . Replace switch if measurements are not as specified.
    Fig 1: Testing Left Door Lock Switch
    G94H46505Courtesy of FORD MOTOR CO.
  7. Unplug right door lock switch. Measure resistance between Pink/Black wire terminal on switch and specified wire terminals, then repeat with Pink/Orange wire terminal. See Fig 2 . Replace switch if measurements are not as specified.
    Fig 2: Testing Right Door Switch
    G94I46506Courtesy of FORD MOTOR CO.
  8. Turn ignition off. Measure resistance of Pink/Light Green and Pink/Yellow wires between left and right switch harness connectors. Measure resistance to ground of same wires. If resistance between connectors is less than 5 ohms, and resistance to ground is greater than 10,000 ohms for each wire, go to next step. If resistance is not as specified, repair appropriate wire.
  9. Unplug right switch connector, leaving left switch connected. Unplug both door lock actuators. Measure resistance of Pink/Black and Pink Orange wires between right switch harness connector and both actuator connectors. Measure resistance to ground of same wires. If resistance between connectors is less than 5 ohms, and resistance to ground is greater than 10,000 ohms for each wire, replace appropriate door lock actuator. If resistance is not as specified, repair appropriate wire.