7 way trailer plug issue...
I have an '09 Ford F450, and I've got an 'ongoing' trailer brake issue. I've taken the truck to my local Ford dealer ($100.00+ to check) and said they could find no problem, but if it still doesn't ...
Forum Discussion
The Ford integrated controller is not inertia-based on the '08(I think?) and newer trucks. It uses a pressure signal from the brake system to proportion the brakes to the trailer based on the bias setting.
The system needs three inputs: The brake pressure switch, brake pedal position switch, and the brake pressure transducer.
I don't understand why the dealership can't figure it out... They can scan the TBC inputs, and at the connector, they can monitor the outputs. Skimming over the troubleshooting manual, it shouldn't take them more than a half hour to sort out the problem, honestly. If you've had it in three times, their techs are incompetent and you need someone experienced to sort it out.
But, start with the basics: Battery junction box fuse #5 (30A), Smart Junction Box (under the dash) #33 (10A) (I doubt it's either, but you ALWAYS have to start with the basics)
They connect the scanner, check for codes, and go from there. My guess is that if there are no codes in teh system, there is a compromised wire or pin in a connector somewhere between the TBC in the dash and the back of the truck. Again, they have detailed instruction on how to find it in the troubleshooting and diagnostics manual. They just need to take the time to do it, plain and simple.
Good luck!!
The system needs three inputs: The brake pressure switch, brake pedal position switch, and the brake pressure transducer.
I don't understand why the dealership can't figure it out... They can scan the TBC inputs, and at the connector, they can monitor the outputs. Skimming over the troubleshooting manual, it shouldn't take them more than a half hour to sort out the problem, honestly. If you've had it in three times, their techs are incompetent and you need someone experienced to sort it out.
But, start with the basics: Battery junction box fuse #5 (30A), Smart Junction Box (under the dash) #33 (10A) (I doubt it's either, but you ALWAYS have to start with the basics)
They connect the scanner, check for codes, and go from there. My guess is that if there are no codes in teh system, there is a compromised wire or pin in a connector somewhere between the TBC in the dash and the back of the truck. Again, they have detailed instruction on how to find it in the troubleshooting and diagnostics manual. They just need to take the time to do it, plain and simple.
Good luck!!
