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Gauge Indications Are Inaccurate

  1. Check wiring for corroded or loose connections. Clean and tighten terminals and connections as necessary. Check for high resistance in temperature sending unit ground circuit. If terminals, connections, and ground circuit are okay, go to next step.
  2. Unplug connector from temperature gauge sending unit. Measure sending unit resistance at specified temperatures. See TEMPERATURE GAUGE SENDING UNIT RESISTANCE table. If measurements are not as specified, replace temperature gauge sending unit.
TEMPERATURE GAUGE SENDING UNIT RESISTANCE

Degrees °F (°C) Ohms
104 (40) 1200
257 (125) 53.4
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