Cruise Indicator Inoperative
NOTE:
Cruise control system operates properly.
- If cruise control diagnostic system check has been performed, go to next step. If cruise control diagnostic system check has not been performed, go to CRUISE CONTROL DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Connect scan tool to Data Link Connector (DLC). See Figure . Select Powertrain Control Module (PCM) data list on scan tool. Start engine and drive vehicle at a speed greater than 25 MPH (40 km/h). Engage cruise control. Monitor CRUISE REQUESTED status. If CRUISE REQUESTED status is YES, go to next step. If CRUISE REQUESTED status is not YES, go to step 4 .
- Stop vehicle. Turn ignition off and back on. This will activate Instrument Panel Cluster (IPC) bulb check. Observe CRUISE indicator during the bulb check. If CRUISE indicator illuminates during bulb check, check for intermittent connections or faulty circuits. If CRUISE indicator does not illuminate during bulb check, go to step 9 .
- Turn ignition off. Disconnect cruise control module located on left front shock tower, behind air cleaner assembly. Connect a 3-amp fused jumper between ground and cruise control module connector terminal "J" (Light Blue/Black wire). Start engine and drive vehicle at a speed greater than 25 MPH (40 km/h). Engage cruise control. Monitor CRUISE REQUESTED status. If CRUISE REQUESTED status is not YES, go to next step. If CRUISE REQUESTED status is YES, go to step 7 .
- Check for open, high resistance or short to voltage in Light Blue/Black wire between cruise control module and Powertrain Control Module (PCM) connector C2 terminal No. 24. See Fig 1 . If circuit is okay, go to next step. If faulty circuit is found and repaired, go to step 11 .
- Check for poor connections at PCM connector. If connections are okay, go to step 8 . If faulty connections are found and repaired, go to step 11 .
- Check for poor connections at cruise control module connector. If connections are okay, go to step 10 . If faulty connections are found and repaired, go to step 11 .
- Replace PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. After repairs, go to step 11 .
- Replace IPC. See INSTRUMENT PANEL CLUSTER under REMOVAL & INSTALLATION. After repairs, go to step 11 .
- Replace cruise control module. See CRUISE CONTROL MODULE under REMOVAL & INSTALLATION in CRUISE CONTROL SYSTEMS - DEVILLE & ELDORADO article. After repairs, go to next step.
- After repairs, recheck operation of CRUISE indicator. If indicator operates properly, repair is complete. If indicator does not operate properly, go to step 2 .