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.
( + ) FC1 Relay Connector, Harness Side | ( - ) |
|---|---|
GND - Pin 2 | Ground |
• Measure the resistance between:
( + ) FC3 Relay Connector, Harness Side | ( - ) |
|---|---|
GND - Pin 2 | Ground |
• For all others,
• Measure the resistance between:
( + ) FC Relay Connector, Harness Side | ( - ) |
|---|---|
GND | Ground |
Is the resistance less than 5 ohms?
Yes | No |
|---|---|
GO to KN9 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
KN9 CHECK FOR AN OPEN CIRCUIT
• Ignition OFF.
• PCM connector disconnected.
• For Edge and MKX,
• Measure the resistance between:
( + ) Cooling Fan Motor 1 Connector, Harness Side | ( - ) |
|---|---|
GND - Pin 1 | Ground |
• Measure the resistance between:
( + ) Cooling Fan Motor 1 Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
FCV - Pin 4 | FCV |
• Measure the resistance between:
( + ) Cooling Fan Motor 1 Connector, Harness Side | ( - ) FC3 Relay Connector, Harness Side |
|---|---|
FANPWR - Pin 2 | FANPWR - Pin 3 |
• Measure the resistance between:
( + ) Cooling Fan Motor 2 Connector, Harness Side | ( - ) |
|---|
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.