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Home >> GMC >> 1995 >> Forward Control 4.3 Z, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel. >> Testing >> Coolant Level Indicator (Diesel) >> Indicator Does Not Light When Coolant Level Is Low (Van)

Indicator Does Not Light When Coolant Level Is Low (Van)

  1. Unplug coolant level sensor. Turn ignition on. If indicator light does not come on, go to next step. If indicator light comes on, replace coolant level sensor.
  2. Disconnect coolant level indicator module. Check for battery voltage between coolant level sensor connector Pink/Black wire and ground. If battery voltage exists, go to next step. If battery voltage does not exist, repair short or open in Pink/Black wire.
  3. Check for battery voltage between Pink/Black wire and Black wire at coolant level indicator module connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Black wire between coolant level indicator module and instrument panel.
  4. Check for battery voltage between Gray wire and ground at coolant level indicator module connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short in Gray wire between coolant level indicator module and instrument panel.
  5. Check for battery voltage between Pink/Black wire and Yellow/Black wire at coolant level indicator module connector. If battery voltage exists, repair open or short in Yellow/Black wire between coolant level indicator module and coolant level sensor. If battery voltage does not exist, replace coolant level indicator module.
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