Allison 6sp: Co Pilot problems

x MadMAX DIESEL

x MadMAX DIESEL

<<<< No Horsepower
Dec 30, 2008
7,535
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Lexington, Ky
I just installed a co pilot for a 6 speed in my truck.
It is stuck in 3rd gear. With codes p0700 ofcourse, 2727, and 0659.

With the main external harness unplugged the truck is fine, with it plugged in it goes straight to limp mode and shifts VERY violently into drive, or reverse.
This happens with the co pilot on or off too.


What could it be? a bad harness, or a bad co pilot? Is there any way to test the harness, or does anyone near me have a known working copilot for a 6 speed they would let me hook up to see if its the harness or box?
 
x MadMAX DIESEL

x MadMAX DIESEL

<<<< No Horsepower
Dec 30, 2008
7,535
1
38
34
Lexington, Ky
Well guys Its not under warranty. So they want 240 for a new harness, but I found the short its right on the female piggy back of the main external harness... Its a pulled wire on the connecter, Do you guys know how to open up the connecters with out breaking them?
 
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