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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Engine Controls - Tests W/Codes - Body Control Computer) >> Self-Diagnostic Tests >> Test 79A - LF Door (With RKE) Fails To Lock & Unlock

Test 79A - LF Door (With RKE) Fails To Lock & Unlock

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
NOTE: RKE module may be accessed by carefully prying each end of instrument panel top cover and sliding cover forward to disengage front clips.
  1. Gain access to RKE module. RKE module is located under instrument panel top cover, behind information center. Disconnect RKE module Black connector. Go to next step.
  2. Using scan tool in ohmmeter mode, check resistance of RKE module Black connector terminal "H" (Black wire). If resistance is more than 5 ohms, repair open Black wire. If resistance is less than 5 ohms, go to next step.
  3. Connect a jumper wire between RKE module connector terminals "G" (Dark Blue wire) and "H" (Black wire). Press door lock switch to LOCK position. If LF door operates, replace RKE module. If LF door lock does not operate, go to next step.
  4. Remove jumper wire. Using scan tool in voltmeter mode, check voltage on RKE module Black connector terminal "A" (Pink wire). If voltage is less than 10 volts, repair open Pink wire. If voltage is more than 10 volts, go to next step.
  5. Check voltage on RKE module Black connector terminal "C" (Orange/Violet wire). Press door lock switch to LOCK position while observing scan tool voltage. If voltage is less than 10 volts while switch is in LOCK position, repair open Orange/Violet wire. If voltage is more than 10 volts, go to next step.
  6. Check voltage on RKE module Black connector terminal "E" (Pink/Violet wire). Press door lock switch to UNLOCK position while observing scan tool voltage. If voltage is less than 10 volts while switch is in UNLOCK position, repair open Pink/Violet wire. If voltage is more than 10 volts, go to next step.
  7. Reconnect RKE module Black connector. Using scan tool in voltmeter mode, backprobe RKE module connector terminal "G" (Dark Blue wire). Press door lock switch to UNLOCK position while observing scan tool voltage. If voltage is less than 10 volts while switch is in UNLOCK position, replace RKE module. If voltage is more than 10 volts, go to next step.
  8. Remove LF door panel. Disconnect LF door lock motor connector. Using scan tool in voltmeter mode, check voltage on LF door lock motor connector terminal No. 1 (Orange/Black wire). If voltage is less than 10 volts, repair open Orange/Black wire. If voltage is more than 10 volts, go to next step.
  9. Check voltage on LF door lock motor connector terminal No. 2 (Dark Blue wire). Press door lock switch to UNLOCK position while observing scan tool voltage. If voltage is less than 10 volts, repair open Dark Blue wire. If voltage is more than 10 volts, replace door lock motor.
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