All Gauges Inoperative
- Remove instrument cluster. Turn ignition on. Connect test light between instrument cluster connector terminal "Z" and ground. See Fig 1
. If test light does not come on, repair open in Pink/Black wire. If test light comes on, go to next step.
- Connect test light between instrument cluster connector terminal "K" and ground. If light does not come on, repair open in Pink/Black wire. If test light comes on, connect test light between connector terminals "K" and "M". If test light does not come on, repair open in Black/White wire. If test light comes on, go to next step.
- Connect test light between instrument cluster connector terminals "K" and "T". If light does not come on, repair open in Black wire. If test light comes on, check for poor connections at instrument cluster. If connections are okay, replace instrument cluster.
Courtesy of GENERAL MOTORS CORP.