Instrument Cluster Service Precautions

WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Do not use a test light to diagnose the instrument cluster electrical systems unless specifically instructed by diagnostic procedures. Use the connector test adapter kit J 35616-A, or equivalent adapters when diagnostic procedure require probing of connectors. See SPECIAL TOOLS .

The instrument cluster will withstand normal current draws associated with vehicle operations. Avoid overloading any circuit. When testing for opens or shorts, do not ground or apply voltage to the instrument cluster circuits unless instructed to do so. These circuits may only be tested using a Digital Multimeter (DMM) J 39200, or equivalent. Electrical circuits should be tested with a DMM J 39200 while the Instrument Panel Cluster (IPC) connector remains connected to the instrument cluster or the recommended breakout box.

Never remove or apply voltage to the instrument cluster with the key in the RUN position. Before removing or connecting battery cables, fuses or connectors always turn the key to the LOCK position. Whenever a instrument cluster removal and replacement is performed, follow the removal and replacement instructions.