F 250 4WD Super Duty V8-5.4L (2009)
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Measure the voltage between the trailer electric brake controller C2142-8, circuit SBB05 (GY/RD), harness side and the trailer electric brake
controller C2142-11, circuit GD115 (BK/GY), harness side.
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Is the resistance less than 5 ohms?
Yes
GO to AE8.
No
REPAIR the circuit. TEST the system for normal operation.
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AE8 CHECK THE TRAILER ELECTRIC BRAKE CONTROLLER OUTPUT CIRCUIT FOR A SHORT TO GROUND
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Measure the resistance between the trailer electric brake controller C2142-14, circuit CAT19 (BU), harness side and ground.
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Is the resistance greater than 10,000 ohms?
Yes
GO to AE9.
No
REPAIR circuit CAT19 (BU) for a short to ground. TEST the system for normal operation.
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AE9 CHECK THE TRAILER ELECTRIC BRAKE CONTROLLER OUTPUT CIRCUIT FOR AN OPEN
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Connect a fused jumper wire between the trailer electric brake controller C2142-8, circuit SBB05 (GY/RD), harness side and the trailer electric
brake controller C2142-14, circuit CAT19 (BU), harness side.
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Measure the voltage between the trailer tow C4099-3, circuit CAT19 (BU), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
INSTALL a new trailer electric brake controller. TEST the system for normal operation.
