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Test B: No Communication With Driver Seat Module

WARNING: This page is about a different car, the 1997 Lincoln Mark VIII. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Connector C362 is a 2 terminal connector. Identify by wire color. See WIRING DIAGRAMS  .
  1. Test Power Supply To Driver Seat Module  - Disconnect driver seat module connector C362. Check voltage at Red wire of driver seat module harness connector C362. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 7).
  2. Test Fuse No. 19  - Remove fuse No. 19 (30-amp) from power distribution box in engine compartment. If fuse is blown, go to next step. If fuse is not blown, repair open in Red wire.
  3. Test Red Wire For Short  - Check resistance in Red wire between output side of fuse No. 19 and ground. If resistance 10,000 ohms or less, go to next step. If resistance is greater than 10,000 ohms, go to step 5).
  4. Test Red Wire For Short  - Disconnect lumbar switch connector. Check resistance in Red wire between lumbar switch harness connector and ground. If resistance is greater than 10,000 ohms, replace lumbar switch. If resistance 10,000 ohms or less, repair short in Red wire.
  5. Test Red/White Wire For Short  - Disconnect lumbar switch connector. Check resistance in Red/White wire between lumbar switch harness connector and ground. If resistance is greater than 10,000 ohms, go to next step. If resistance is 10,000 ohms or less, repair short in Red/White wire.
  6. Test Red/Black Wire For Short  - Check resistance in Red/Black wire between lumbar switch harness connector and ground. If resistance is greater than 10,000 ohms, replace driver seat module. If resistance is 10,000 ohms or less, repair short in Red/Black wire.
  7. Test Power Supply To Driver Seat Module  - Disconnect driver seat module connector C311. See Figure . Check voltage at Light Blue/White wire of driver seat module harness connector C311. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 11).
  8. Test Fuse No. 35  - Remove fuse No. 35 (10-amp) from in-car fuse panel. If fuse is blown, go to next step. If fuse is not blown, repair open in Light Blue/White wire.
  9. Test Red Wire For Open  - Check voltage at input side of fuse No. 35. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red wire.
  10. Test Light Blue/White Wire For Short  - Check resistance in Light Blue/White wire between driver seat module harness connector C311 and ground. If resistance is greater than 10,000 ohms, replace driver seat module. If resistance is 10,000 ohms or less, repair short in Light Blue/White wire.
  11. Test Black/Light Blue Wire For Open  - Check resistance in Black/Light Blue wire between driver seat module harness connector C311 and ground. If resistance is greater than 5 ohms, repair open in Black/Light Blue wire. If resistance is 5 ohms or less, test module communications. See MODULE COMMUNICATIONS NETWORK article.
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