Diesel Forum - TheDieselStop.com - View Single Post - Factory Brake Controller Issue
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post #3 of (permalink) Old 03-29-2016, 02:06 PM
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Join Date: Apr 1999
Location: Justin,Texas, Republic of TEXAS (USA)
Posts: 5,286
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I believe the software on the 2005-2007 reduces brake current to a minimal amount with zero vehicle speed and ramps it up to normal amount as you speed up to 12-18 mph. One of my 2006 trucks has factory controller and I can roll the wheels with some effort if someone depresses pedal and I spin a jacked up trailer wheel.
The other thing to check is what is the voltage on the ground side with brakes applied full with manual lever. IF you see over 0.3 V on the ground then clean/repair grounds. Ohm meter inspection of grounds is NOT ACCURATE. One strand of wire connected will show 0.0 to 0.4 ohms but you will have very low current flow (and high voltage reading) on the ground side when the circuit load is present.

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