LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1989 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Standard & Electronic >> Testing >> Electronic Instrument Cluster Test >> Cluster Display Does Not Light (Astro & Safari)

Cluster Display Does Not Light (Astro & Safari)

  1. Check for ignition feed to cluster, ground, and for an inoperative cluster. To do so, disconnect large 17-pin connector from cluster.
  2. Using a digital volt/ohmmeter, measure voltage from pin No. 13 to ground with ignition switch in "RUN" position. Battery voltage should exist. If okay, go to next step. If meter reads less than battery voltage or zero, repair Pink/White wire from ignition. See Figure .
  3. Using a digital volt/ohmmeter, measure resistance from pins No. 15 and 16 to ground. If meter reads anything but 0-0.5 ohms, repair Black wires at pins No. 15 and 16 to ground. If resistance is correct, go to next step.
  4. If ignition feed and ground circuits are okay, replace inoperative instrument cluster.