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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 475/M40 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Standard & Electronic >> Testing >> Elect. I/C Testing (S & T Series) >> Cluster Display Does Not Light

Cluster Display Does Not Light

  1. Check for ignition power to cluster and for an inoperative cluster. Disconnect large 34-pin connector from cluster. Using a DVOM, measure voltage from connector pin terminals A15 to pin B7 with ignition on.
  2. If DVOM reads less than battery voltage or zero, repair Pink/White wire from ignition. If ignition power circuit is okay, replace inoperative instrument cluster.
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