F 550 2WD Super Duty V10-6.8L (2009)
Yes
GO to AD12.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
AD8 CHECK FOR VOLTAGE AT THE TRAILER TOW CONNECTOR (BATTERY CHARGE ALWAYS ON)
-
Ignition OFF.
-
Measure the voltage between the trailer tow connector battery charge voltage supply pin, circuit CAT14 (OG), component side and ground.
-
Is any voltage present?
Yes
GO to AD9.
No
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
-------------------------------------------------
AD9 CHECK THE TRAILER BATTERY CHARGE VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
-
Disconnect: Trailer Battery Charge Relay.
-
Measure the voltage between the trailer tow connector battery charge voltage supply pin, circuit CAT14 (OG), component side and ground.
-
Is any voltage present?
Yes
REPAIR circuit CAT14 (OG) for a short to voltage. TEST the system for normal operation.
No
GO to AD10.
-------------------------------------------------
AD10 CHECK THE TRAILER BATTERY CHARGE RELAY (ALWAYS ON)
-
Measure the voltage between the trailer battery charge relay pin 85, circuit CBP33 (WH/BN), BJB face side and ground.
