Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
( + ) FC2 Relay Connector, Harness Side | ( - ) Cooling Fan Motor 2 Connector, Harness Side |
|---|---|
FANPWR | FANPWR - Pin 1 |
• Measure the resistance between:
( + ) FC2 Relay Connector, Harness Side | ( - ) Cooling Fan Motor 1 Connector, Harness Side |
|---|---|
FANRSTR1 | FANPWR |
FANPWR | FANPWR |
• For all others FC3 relay,
• Measure the resistance between:
( + ) FC3 Relay Connector, Harness Side | ( - ) Cooling Fan Motor 2 Connector, Harness Side |
|---|---|
FANPWR | FANPWR - Pin 1 |
• Measure the resistance between:
( + ) FC3 Relay Connector, Harness Side | ( - ) Cooling Fan Motor 1 Connector, Harness Side |
|---|---|
FC | FC |
• For all others FC4 relay,
• Measure the resistance between:
( + ) FC4 Relay Connector, Harness Side | ( - ) Cooling Fan Motor 2 Connector, Harness Side |
|---|---|
FANRSTR2 - Pin 4 | FANPWR - Pin 1 |
FANPWR - Pin 5 | FANPWR - Pin 1 |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to KF19 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
KF19 CHECK THE FAN PWR CIRCUIT FOR A SHORT TO VOLTAGE
Note: For vehicles with a single cooling fan, disregard the cooling fan motor 2 measurement in this step.
• Ignition ON, engine OFF.
• For Focus 1.0L,
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.