LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1989 >> Forward Control 4.8 T, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Standard & Electronic >> Testing >> Electronic Instrument Cluster Test >> Speedometer & Odometer Do Not Operate (Astro, Safari & "S" Series)

Speedometer & Odometer Do Not Operate (Astro, Safari & "S" Series)

  1. Check for vehicle speed sensor signal. To do so, disconnect large 17-pin connector (34-pin connector on "S" series) from cluster and the Digital Ratio Adapter Controller (DRAC) connector.
  2. Measure resistance between wire at pin No. 1 ("A11" on "S" series) of cluster and wire at pin "B" of DRAC harness. If resistance is above zero (0) ohms, and the vehicle speed sensor circuit is working properly, replace inoperative instrument cluster.
scientia non olet · About LEMON Manuals