LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1992 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Testing & Diagnosis >> Coolant Temperature Gauge >> Gauge Readings Are Inaccurate

Gauge Readings Are Inaccurate

  1. Check wiring for corroded or loose connections. Clean and tighten terminals and connections as necessary. Also check resistance in temperature sending unit ground circuit. If terminals, connections and ground circuit are okay, go to next step.
  2. Disconnect lead connector from temperature gauge sending unit. Using an ohmmeter, test sending unit resistance. See TEMPERATURE GAUGE SENDING UNIT RESISTANCE table. If sending unit values are incorrect, replace temperature gauge sending unit.
TEMPERATURE GAUGE SENDING UNIT RESISTANCE

Degrees °F (°C) Ohms
104 (40) 1200
257 (125) 53.4
scientia non olet · About LEMON Manuals