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Home >> Buick >> 1995 >> LeSabre Custom >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Testing >> Instrument Cluster Dim Input Test >> Base Cluster

Base Cluster

  1. Turn ignition off. Disconnect instrument cluster connector. Put headlight switch in PARK or HEAD position. Put dimmer switch in LO position. Check for good terminal contact at instrument cluster connector terminal B4 and repair as necessary.
  2. If terminal contact is okay, measure voltage at Gray wire between instrument cluster connector terminal B4 and ground while adjusting dimmer control. If voltage varies with dimmer control, replace instrument cluster.
  3. If voltage does not vary with dimmer control, connect test light between voltage and instrument cluster connector Gray wire at terminal B4. If test light lights, repair short to ground in Gray wire. If test light does not light, check for open circuit in Gray wire and repair as necessary. If circuit is okay, replace headlight switch.
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