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Home >> Lincoln >> 1998 >> Mark VIII Base >> Repair and Diagnosis >> Electrical >> Starter >> System Tests >> Test A: No Communication With SCIL Module

Test A: No Communication With SCIL Module

  1. Check Black/Light Blue Wire For Open

    Ensure ignition is off. Disconnect 26-pin connector C288 from Steering Column/Ignition/Lighting (SCIL) control module. See Fig 1 . SCIL module is located behind passenger's side of instrument panel, to right of glove box. SCIL module contains one 16-pin connector, one 22-pin connector and two 26-pin connectors.
  2. Using ohmmeter, check resistance between ground and terminal No. 14 (Black/Light Blue wire) on connector C288 for SCIL module.
    Fig 1: Identifying Terminals On SCIL Module Connectors C287 & C288
    G96E29433Courtesy of FORD MOTOR CO.
  3. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open ground circuit on Black/Light Blue wire to SCIL module. Retest system operation.

  4. Check Black Wire For Open

    Disconnect connector C287 from SCIL module. See Fig 1 . Using ohmmeter, check resistance between ground and terminal No. 7 (Black wire) on connector C287 for SCIL module.
  5. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open ground circuit on Black wire to SCIL module. Retest system operation.

  6. Check For Voltage At SCIL Module

    Disconnect connector C289 from SCIL module. Turn ignition on. Using voltmeter, check voltage between ground and terminals No. 11 (Dark Blue/Light Green wire), No. 14 (Red/Orange wire), No. 15 (White/Light Green wire) and No. 26 (Light Blue/Red wire) on connector C287 for SCIL module.
  7. If battery voltage exists at all designated terminals, a communication network problem exists. See MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  8. If battery voltage does not exist, check for defective fuse or wiring circuit from fuse in fuse panel to connector C287 for the SCIL module. For terminal number, wire color and fuse application, see FUSE & WIRE APPLICATION table. Fuses are located in fuse panel at driver's side end of instrument panel, near door opening. Repair fuse or wiring circuit as necessary and proceed to next step.
  9. Using voltmeter, check voltage between ground and terminals No. 16 (Brown/Orange wire) and No. 18 (Black/Pink wire) on connector C288 for SCIL module. See Fig 1 . If battery voltage exists at all designated terminals, a communication network problem exists. See COMMUNICATION NETWORK FAILURE under TESTING in MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT. If battery voltage does not exist, repair appropriate circuit as necessary and go to next step.
  10. Using voltmeter, check voltage between ground and terminals No. 1 (Tan wire), No. 5 (Brown/White wire) and No. 6 (Orange/Black wire) on connector C289 for SCIL module. See Fig 2 .
    Fig 2: Identifying Terminals On SCIL Module Connector C289
    G96D29432Courtesy of FORD MOTOR CO.
  11. If battery voltage exists at all designated terminals, a communication network problem exists. See MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  12. If battery voltage does not exist, check for defective fuse or wiring circuit from fuse to connector C289 for the SCIL module. For terminal number, wire color and fuse application, see FUSE & WIRE APPLICATION table. Fuses No. 7, 13 and 31 are located in the fuse panel at driver's side end of instrument panel, near door opening. Once repair is complete, reinstall all connectors and use scan tool to perform On-Demand Self-Test on SCIL module to ensure problem has been repaired.
FUSE & WIRE APPLICATION

Terminal No. (Wire Color) Fuse No. (Amperage)
Connector C287
11 (Dark Blue/Light Green) 25 (10-Amp)
14 (Red/Orange) 26 (15-Amp)
15 (White/Light Green) 19 (10-Amp)
26 (Light Blue/Red) 1 (10-Amp)
Connector C289
1 (Tan) 31 (10-Amp)
5 (Brown/White) 13 (15-Amp)
6 (Orange/Black) 7 (15-Amp)
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