I have a wrecked 2006 LBZ/Allison that I have put a cab on from a 2004 LB7/ZF6 since putting everything together the tap shifter or tow/haul will not come on. I have the tap shift wired(purple wire from I/P harness to C100 connector). Since the harness is from a pickup with the ZF6 I was wondering if the wires may not be there for the tow/haul i assumed they wouldn't be there for the tap shifter being as that was not an option in 2004. Any help to get this problem fixed would be appreciated. Thank you.