Any PCI Bus Indicator Inoperative
Test is for all indicators with exception of turn signal, high beam and foglight indicators (bulbs). Ensure instrument cluster communicates on PCI bus. Diagnose and repair any Diagnostic Trouble Codes (DTC) before continuing. Turn ignition off. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article. Remove suspect Light Emitting Diode (LED) from instrument cluster. Using a DVOM, select DIODE mode. Connect DVOM black lead to LED negative (-) terminal. Connect DVOM Red lead to LED positive (+) terminal. If LED illuminates, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article. If LED does not illuminate, replace defective LED.