With Electronic Instrument Cluster

Electronic Cluster, Diagnostic Test Mode:

Visually inspect the components. Check for damaged components, blown fuses and loose or corroded connections. Check the wiring harness for obvious signs of shorts, opens or damage.

Verify speedometer and odometer operation by road testing the vehicle.

NOTE: Perform the following electronic instrument cluster self test, prior to performing any Pinpoint Tests.

1. Press the E/M and SELECT (reverse select) buttons simultaneously while turning ignition switch from OFF to RUN. The electronic instrument cluster will enter a special test mode and display information in the center display opening. Information displayed includes a number in the speedometer display and two numbers in the odometer display, one on the left and one on the right. Both the left and right display openings will be dark (off).
2. If any of the displayed information in the center opening flashes on and off continuously, the electronic instrument cluster is inoperative and should be replaced. (After replacing the instrument cluster, verify that the symptom is no longer present. If symptoms persist, begin diagnosis again.) If the display does not flash, turn the ignition switch to OFF to exit this special test mode. Then continue through the diagnosis section (the instrument cluster may or may not be damaged at this point).
3. If the concern remains after Instrument Cluster Self-Test, connect the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to the data link connector (DLC) located beneath the instrument panel to perform DATA LINK DIAGNOSTICS test. If the NGS responds with NO RESPONSE 1 NOT EQUIPPED for the lighting control module, go to Pinpoint Test A. A: No Communication With Lighting Control Module
If the DATA LINK DIAGNOSTICS test is passed for the lighting control module, retrieve continuous DTCs and execute Self-Test Diagnostics for the lighting control module to retrieve current DTCs.
4. If self test is passed and no DTCs are retrieved, go to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures
5. If DTCs are retrieved, go to the Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics. Lighting Control Module (LCM) Diagnostic Trouble Code Index
6. If the lighting control module cannot be accessed by the NGS, go to Pinpoint Test A. A: No Communication With Lighting Control Module

Rotunda Service Bay Diagnostic System (SBDS (R)) 001-00001, may also be used to diagnose this system.