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Test F: Lighting Control Module (LCM) Does Not Respond To Scan Tester

WARNING: This page is about a different car, the 1997 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ignition switch is in OFF position. Disconnect 84-pin harness connector C217. Harness connector C217 is located behind driver's side of instrument panel. See Figure .
  2. Using ohmmeter, check resistance between terminal No. 76 (Tan/Orange wire) on male side of harness connector C217 and terminal No. 2 (Tan/Orange wire) on Data Link Connector (DLC). See Figure and Figure .
  3. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Tan/Orange wire between DLC and harness connector C217. Repeat TEST A  .
  4. Using ohmmeter, check resistance between terminal No. 77 (Pink/Light Blue wire) on male side of harness connector C217 and terminal No. 10 (Pink/Light Blue wire) on DLC. See Figure and Figure .
  5. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Pink/Light Blue wire between DLC and harness connector C217. Repeat TEST A  .
  6. Disconnect 84-pin harness connector C212. Harness connector C212 is located behind driver's side of instrument panel. See Figure .
  7. Using ohmmeter, check resistance between terminal No. 28 (Tan/Orange wire) on female side of harness connector C212 and terminal No. 76 (Tan/Orange wire) on female side of harness connector C217. See Figure .
  8. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Tan/Orange wire between harness connectors C212 and C217. Repeat TEST A  .
  9. Using ohmmeter, check resistance between terminal No. 29 (Pink/Light Blue wire) on female side of connector C212 and terminal No. 77 (Pink/Light Blue wire) on female side of harness connector C217. See Figure .
  10. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Pink/Light Blue wire between harness connectors C212 and C217. Repeat TEST A  .
  11. Disconnect Black 22-pin connector C206 from Lighting Control Module (LCM). The LCM is located on instrument panel, behind headlight switch and uses a 12-pin connector, 21-pin connector and a 22-pin connector. See Figure .
  12. Using ohmmeter, check resistance between terminal No. 28 (Tan/Orange wire) on male side of harness connector C212 and terminal No. 11 (Tan/Orange wire) on connector C206. See Figure and Fig 1 .
  13. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Tan/Orange wire between harness connector C212 and connector C206. Repeat TEST A  .
  14. Using ohmmeter, check resistance between terminal No. 29 (Pink/Light Blue wire) on male side of connector C212 and terminal No. 22 (Pink/Light Blue wire) on connector C206. See Figure and Fig 1 .
  15. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Pink/Light Blue wire between harness connector C212 and connector C206. Repeat TEST A  .
  16. Inspect pins and wire connections on harness connector C212 and connector C206. If pins and wire connections are okay, replace LCM. Repeat TEST A  . If pins or wire connections are defective or damaged, repair pins or wire connections as necessary. Repeat TEST A  .
Fig 1: Identifying Connector C206 Terminals
G97D28772Courtesy of FORD MOTOR CO.
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