LB7: 2001 5 speed allison tcm ground issue. in need of ground wire diagram of body harness

[bonomax]

Hey guys have grounding issue with tcm. Check all the ground on the motor and frame everything seems to be grounded. I'm in need of wire diagram for 2001 dmax with allison 1000 5 speed. Really just wanting to know where the ground wires go to for the tcm. I already have a pin out diagram of tcm. Just need body harness diagram. Or if anyone knows where the tcm grounds to if their is fuse or ???

Thanks in advance, tom

 

[bonomax]

found wiring diagram. those 2 ground wires pin 1 and pin 5 tee into one location at S103 then to G105. anyone know where those S103 and G105 locations are physically on the truck?

in the attached is diagram for 2001 TCM wiring

 

[bonomax]

nevermind ended up finding the problem to be loose ground wire on engine block drive side.

 

[Starfire47]

Long shot, but do you still have the wiring diagram for ground locations? I cant seem to find them attached.
Thanks!

 

[Chevy1925]

Long shot, but do you still have the wiring diagram for ground locations? I cant seem to find them attached.
Thanks!

Engine block ground are at the front of the block, just above the upper oil pan on the left and right side. follow the main grounds of the batteries and you will find them. there are 3 on the left side and 2 on the right IIRC

 

[Ron Nielson]

Wiring diagrams available here: https://www.gmupfitter.com/pages/body-builder-manuals. Look for the ELECTRICAL MANUAL for the year/model of your truck.

 

[Mike L.]

TCM is grounded at the right front of engine block above pan.