Mountaineer AWD V8-4.6L (2010)
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
TBC module
-
Trailer tow connector
-
Trailer
PINPOINT TEST AD: THE TRAILER ELECTRIC BRAKES ARE INOPERATIVE/ALWAYS APPLIED
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Before beginning diagnostics, visually inspect the trailer tow connector for signs of corrosion or damage. Repair or install a new trailer tow
connector as required.
-------------------------------------------------
AD1 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (INOPERATIVE CONDITION)
-
Ignition OFF.
-
Disconnect the trailer from the vehicle.
-
Set the gain on the TBC module to the maximum setting.
-
While applying the brake pedal, measure the voltage between the trailer tow connector pin 3, circuit CAT19 (BU), component side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to AD8.
No
GO to AD2.
-------------------------------------------------
AD2 CHECK THE TRAILER TOW CONNECTOR
-
Disconnect: Trailer Tow C473.
-
While applying the brake pedal, measure the voltage between the trailer tow C473-3, circuit CAT19 (BU), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
GO to AD3.
