Engine Will Not Start When Below 40 Degrees F

Tests 1 - 3:

Tests 4 - 8:

SYMPTOM
* ENGINE WILL NOT START WHEN BELOW 40 °F

POSSIBLE CAUSES
- Fuel heater ground circuit open
- Fuel heater relay ground circuit open
- Fuel heater relay output circuit open
- Fused B(+) circuit open
- Fused ignition switch output circuit open
- Fuel heater relay
- Fuel heater