HMMWV TCM Schematic

[wildchildsteel]

I am looking for the schematic for a TCM on a HMMWV. There is 2 grounds on the J2 diagnostic port. I need to know which one is the chassis ground and which is the signal ground. Pin A and F is the grounds.

 

[usmc81301]

Hopefully this helps.

 

[wildchildsteel]

Thank you for your response. Yes I have the schematics to. I see that you are correct, however if you look inside the TCM box you will notice that either pin F or A goes directly to ground in the box. The other ground will tie into the big harness of the TCM. The TM's do not cover the wiring inside the TCM box. It only shows the pins on outside of the box. I do not have one laying around to take the cover off.

https://www.ebay.com/itm/Used-Trans...m=322775244013&_trksid=p2047675.c100005.m1851

　








https://www.ebay.com/itm/Used-Transmiss ... 0005.m1851

 

[wildchildsteel]

Where did u get the diagram u sent?..i have seen that pic before

 

[wildchildsteel]

This is what I was looking for

 

[Mogman]

View attachment 718063 Hopefully this helps.

Does anyone have this in a PDF?

 

[AAVP7]

It´s all in this guide:

https://gear-report.com/wp-content/...ment_7_4L80E-Transmission_Troubleshooting.pdf