Test Procedure

WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

AN1 VERIFY CORRECT PTO OPERATION

Ignition OFF.
Disconnect the PTO system or auxiliary idle control.
Ignition ON, engine running.

Is a concern present?

Yes	No
GO to AN2.	REFER to the Owner's Literature provided with the PTO system or auxiliary idle control to verify correct operating procedures, entry conditions, and diagnostic information.

AN2 CHECK THE PTO INPUT FOR A SHORT TO VOLTAGE

Ignition OFF.
PCM-B connector disconnected.
Ignition ON, engine OFF.
For F-650/750,

Measure the voltage between:

(+) PCM-B Connector, Harness Side	(-)
PTO	Ground
PTO2	Ground

For F-Series Super Duty,

Measure the voltage between:

(+) PCM-T Connector, Harness Side	(-)
PTO - Pin 19	Ground
PTO2 - Pin 18	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	REFER to the Owner's Literature provided with the PTO system or auxiliary idle control to verify correct operating procedures, entry conditions, and diagnostic information. Clear the PCM DTCs. REPEAT the self-test.