LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1998 >> Forward Control 4.3 W, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Commercial Van >> System Tests >> Low Coolant Indicator Inoperative

Low Coolant Indicator Inoperative

  1. Turn ignition switch to RUN position. Disconnect coolant level sender harness connector. Connect a fused jumper wire between Yellow/Black wire terminal at coolant level sender connector and ground. If low coolant indicator lights, go to step 4). If low coolant indicator does not light, go to next step.
  2. Disconnect instrument cluster harness connector. Connect a test light between harness connector terminal No. 22 (Pink wire) and ground. If test light lights, go to next step. If test light does not light, repair open in Pink wire.
  3. Using a fused jumper wire, backprobe instrument cluster connector terminal No. 25 (Yellow/Black wire) to ground. If low coolant indicator does not light, check bulb. If bulb is okay, replace instrument cluster. If low coolant indicator lights, repair open in Yellow/Black wire.
  4. Connect self-powered test light from coolant level switch harness connector Black wire terminal and ground. If test light lights, replace coolant level sender. If test light does not light, repair open in Black wire.
scientia non olet · About LEMON Manuals