With Tester
- Turn ignition off. Unplug connector from temperature sender. See TEMPERATURE SENDER LOCATION table. Connect one lead of Rotunda Gauge Tester (021-00055) to sender wire at harness connector. Connect other tester lead to ground. Set ignition switch to ACC position.
- Set tester switch to 73 OHMS position. If gauge does not indicate "C", go to next step. If gauge indicates "C", set tester switch to 9.7 OHMS position. If gauge indicates "H", replace sender. If gauge does not indicate "H", go to next step.
- Check sender circuit wiring for shorts and opens. See appropriate chassis wiring diagram in WIRING DIAGRAMS . Repair wiring as necessary. If wiring is okay, replace gauge.
TEMPERATURE SENDER LOCATION
| Model | Location | |
|---|---|---|
| Aerostar | ||
| 3.0L | Above Water Pump Pulley | |
| 4.0L | Top Left Of Engine | |
| Bronco & Pickup | ||
| 4.9L, 5.0L & 5.8L | In Thermostat Housing | |
| 7.3L & 7.5L | Left Front Of Engine | |
| Explorer | Left Of Throttle Body | |
| Ranger | ||
| 2.3L | Top Right Of Engine | |
| 3.0L & 4.0L | Top Left Of Engine | |
| Van | Top Front Of Engine | |