Diagnosis And Testing - Fuel Heater: Testing
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The Fuel Heater is not a separately serviceable component. If diagnostics have led you to replace this sensor, then the whole fuel filter housing assembly (3) needs to be changed.
- Disconnect harness connector (1) from heater element.
Ambient temperature must be below the circuit close temperature. If necessary, induce this ambient temperature by placing ice packs on thermostat to produce an effective ambient temperature below circuit close temperature.
Measure resistance across two pins. Operating range is 0.3 - 0.45 Ohms.
- If resistance is out of range, replace the fuel filter housing.