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Power Door Lock Control Unit

  1. Remove power door lock control unit. See COMPONENT LOCATIONS  . Apply battery voltage to control unit terminal No. 8 (Red/Yellow wire). See WIRING DIAGRAMS  . Jumper control unit terminals No. 4 (Black wire), No. 5 (Blue/White wire), and No. 7 (Black/Yellow wire) to battery negative terminal. Connect an analog voltmeter between ground and terminal No. 3 (Blue/Red wire). Set voltmeter to DC volts. Remove jumper wire from control unit terminal No. 5 (Blue/White wire) or No. 7 (Black/Yellow wire). Voltmeter needle should deflect. Repair as necessary. If voltmeter needle deflects, go to next step.
  2. Jumper control unit terminals No. 4 (Black wire) and No. 5 (Blue/White wire) to ground. Connect voltmeter between ground and terminal No. 3 (Blue/Red wire). Jumper control unit terminal No. 7 (Black/Yellow wire) to ground. Voltmeter needle should deflect.
  3. Jumper control unit terminal No. 4 (Black wire) to ground. Connect voltmeter between ground and control unit terminal No. 3 (Blue/Red wire). Jumper control unit terminal No. 7 (Black/Yellow wire) to ground. Voltmeter needle should not deflect. Repair as necessary. If voltmeter needle does not deflect, go to next step.
  4. Check if voltage is present between battery ground and control unit terminals No. 2 (Black/Blue wire) and No. 6 (Black/Red wire). Battery voltage should be present. If circuits do not test as specified, replace door lock control unit.
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