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post #1 of 6 (permalink) Old 07-06-2009, 06:12 PM Thread Starter
 
Join Date: May 2009
Location: Richmond Ontario
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Question Built in Brake Controller

Gidday, my superduty has the factory electric brake contoller.
Just wondering how much voltage there should be from ground to the blue wire when the brake pedal is fully pressed down? Is the contoller supposed to vary the output voltage from 0-12v depending on how much pressure is on the brake pedal?
Any input would be reallly appreciated.
thanks
rob
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post #2 of 6 (permalink) Old 07-07-2009, 09:15 AM
 
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The voltage is controlled by the gain control on the face of the controller (the "+" & "-" buttons). The display will read 0-10 for % of gain that you have selected when a trailer with brakes is connected to the 7 wire Bargman plug.
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post #3 of 6 (permalink) Old 07-07-2009, 11:39 AM Thread Starter
 
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Thanks, I understand what you have said. But I would still like to know how much voltage the controller puts out to pin #2 on the bargman plug on the truck.
I have set the gain control to every point that you can adjust it to ( from 0-10 in 0.5 increments) and the voltage output on pin#2 on the bargman plug never changes.
Makes me think there is a problem with the controller???
Thanks
rob
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post #4 of 6 (permalink) Old 07-08-2009, 10:32 PM
 
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Have you connected it to a trailer and tried it? I'm not sure it will respond correctly to just the load of a test light or meter.
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post #5 of 6 (permalink) Old 07-09-2009, 07:56 AM Thread Starter
 
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I had thought about that. The brake magnets are 3.9 ohms each, wired in parallel. Giving a circuit resistance of about 2 ohms. I put a 2 ohm 10 watt resistor into my test circuit and the maximum voltage from the controller still never went over 3 volts. This is why I'd like to find out what the maximum output voltage of the controller is supposed to be???
thanks again
rob
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post #6 of 6 (permalink) Old 07-09-2009, 08:52 PM
 
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My last truck, an 05 F250 also made me wonder. But I read on some other forums that the 05's brake systems didn't actually work until above 15 mph.
Ford changed this in 06 because of complaints from fifth wheel owners who needed to use the manual control to slide the fifth wheel hitches that are used with short boxes.

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