Symptom Chart
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| Loss of coolant | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The engine overheats. | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The engine does not reach normal operating temperature. | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| The block heater does not operate correctly. | Block heater power cable Block heater |
CHECK continuity in all 3 power cable circuits. If any circuit measures more than 5 ohms, INSTALL a new power cable. CHECK the resistance of the block heater. If the resistance does not measure between 12.5 and 17 ohms, INSTALL a new block heater. |
| The electric cooling fan is inoperative in one or more speeds or does not operate correctly. | Wiring Relays Fuses Cooling fan motor Cooling fan resistor |
Refer to Engine Controls - Introduction (Except Diesel & Hybrid) .. |
| The electric cooling fan stays on all the time. | Wiring Relays |
Refer to Engine Controls - Introduction (Except Diesel & Hybrid) .. |
| Noisy electric cooling fan operation. | Foreign material contamination Fan motor |
REMOVE the foreign material from the cooling fan and shroud. TEST the system for normal operation. If still noisy, INSTALL a new cooling fan assembly. REFER to: Cooling Fan Motor and Shroud . |
| Fan blade detached from fan motor | INSTALL a new cooling fan assembly. REFER to: Cooling Fan Motor and Shroud . |