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Troubleshooting OEM Brake Controller on a 2006 Ford F-350

Question:

Hello, I have a 2006 F350 super duty with factory installed TBC. Hooked up to my RV. RV on blocks so tires turn freely. Did not get a TBC fault, but pressing on truck brakes did not stop any RV tires from turning, when I slid the lever on the dash under the TBC readout, that stopped the RV tires. All fuses are good. Could the break away switch on the RV be part of this problem? The RV battery is fully charged. I took out the TBC module. Where can I take it to be tested? Does it need to be installed in the truck to be tested?

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Expert Reply:

If your OEM controller on your 2006 Ford F-350 is a proportional controller, like the Prodigy P2 # 90885, then it will likely only send power back through the pedal when you are actually moving. The P2 has an internal inertia sensor so that it won't send a lot of power back to the brakes if you are barely moving.

If you are trying to use your OEM brake controller on your F-350 and also use a Titan BrakeRite like part # T4813100 then what you are needing is an adapter. For this specific adapter part you would need adapter # DX35FR.

If you are trying to use your OEM brake controller on your F-350 and also use a Titan BrakeRite like part # T4813102, then what you are needing is an adapter. For this specific adapter part you would need adapter # T4845900.

Sometimes the OEM controllers have difficulty talking with the electric-over-hydraulic (EOH) actuator so this adapter is needed. When using the brake pedal the full power isn't sent back but when using the manual override the full power is sent which is somehow allowing it to communicate.

If you aren't using an EOH system and you are simply experiencing problems with your EOM controller then I wouldn't know of any replacement parts (it is very unlikely that they would have replacement internal components). I would just swap it out for an aftermarket controller like the P2 that I mentioned above.

expert reply by:
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Jon G

Question:

I have a 2006 6L, F350 superduty with factory installed TBC. My RV is on blocks, and has just had all 4 tire brakes adjusted. The slide on the TBC works great. Stops them spinning. I can push the plus button all the way up to 10, and depress the brake and nothing. Q1, does that year have the inertia sensor in the TBC which would explain why nothing happens when I depress the brake pedal. There are two electrical connections which attach to the bottom of the brake cylinder under the fluid reservoir. I believe they have transducers. Q2, do these fail? And if so would that affect the voltage goe throught the TBC and possibly explain why there is no voltage getting sent to the trailer brakes? What do these 2 connect to?

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Expert Reply:

The Ford OEM brake controllers are typically proportional so yes, it would have the inertia sensor which is why you are getting power to your brakes when you use the manual override but not when you press your brake pedal. Once you start towing your trailer you should see that your trailer brakes are activated once you are in motion. I would try testing this at a low speed to begin with though.

I'm guessing the 2 connections you are talking about are on your F-350. I am not sure what those would be connected to but since the problem should be related to your controller being proportional I wouldn't start messing with any wiring until you have a chance to test it.

expert reply by:
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Jon G

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