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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel - Standard & Electronic >> Testing >> Coolant Temp. Gauge Testing - G, P, R & V Series >> Gauge Inoperative Or Inaccurate

Gauge Inoperative Or Inaccurate

  1. Disconnect temperature gauge sender lead connector and connect Gauge Tester (J-24538-A) between sender connector and ground. Turn ignition on. If gauge responds to tester accurately, replace sender. If gauge does not respond or is inaccurate, go to next step.
  2. Disconnect engine firewall harness connector. Connect tester to terminal No. 35 (Dark Green wire) that goes to gauge. If gauge responds to tester accurately, check wiring between sender connector and engine harness connector. If gauge DOES NOT respond, go to next step.
  3. Remove instrument cluster. Check/repair bad connections at gauge terminals or instrument cluster connector. If connections are good, replace gauge.
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