Gauge Readings Are Inaccurate
- 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.
- 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) | 1365 |
| 257 (125) | 55 |