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Good copy, thank you for the info, I appreciate it.

Hi, I did test, and I do have 12v at the tcm input so at least the tcm is seeing 12v there... And you are right, she is shifting and the shifts are good, it doesn't wind out, they are almost unnoticeable (not sure if that's a good thing). I am just not seeing how/where to trace the signal from...

Just a question for anyone... My truck is a 2003 M1097A2 and I am having issues that appear to be TCM or grounding / harness related... First question, OEM TCM or after market like US Shift or similar? If after market, which ones have been easily installed and reliable? Clearly there is...

Copy, thank you.

Copy that, thank you.

I was just tracing wires off the shunt and it appears as if 57T runs up to the trans relay. I don't even think I have all those wires on my truck... one small wire to the shunt for sure and then one small wire to the positive terminal. Thank you for the reply.

Can anyone confirm that I am reading this 4l80 troubleshooting manual right... I think it says... FOUR wires to the shunt (599A, 599B, 57T, 57C) ONE wire to rear battery (290/291/537)

I unplugged the light and used the meter to test the plug connected to the truck - it reads 5.96v In addition to the trans light not coming on, I have also never seen the transfer case light come on the few times I have had it locked in HL or L. If it its a bad tcm, does the tcm number have...

I was hoping running the wire would magically fix my trans light issue but, no luck.

Copy, I just got finished installing a wire - just in case. Thank you

Question. When I first got the truck, it was stuck in limp mode, no trans light. Fixed the limp mode by connecting the 12v wire in the battery box that was cut off. Now it appears to drive well, and seems like its shifting with no problems. It drives on the hwy and of course is loud but I...

Well I am glad I did, I have been up since 2:45 yesterday and today... I was planning on driving her to work but now I will need to figure out this wiring thing. I thought it was all good, no random wires hanging anyplace in the engine bay. I do need to figure out the absolute basic wires...

Thank you very much, I appreciate your quick reply!

Hi, Thanks for the reply. I have a 4 speed truck. I don't see a wire in the engine bay, do I just throw a wire on that yellow stud and run it to the rear battery ( to the positive terminal )? Thank you, David

Question... Not to jinx myself but my truck runs, seems to shift into all gears fine and the generator gauge works, dips down when I crank and shortly after starting it gets into the green zone, normally right on the mark in that green zone. BUT... I saw a video that the guy stated that a...

Ha ha very true... and if I can survive the journey, I'll probably be bald from all the stress :-)

The engine looks good except for the oil sending unit (?), looks like it's leaking / dripping / whatever from it... That could be where its coming from??? Did a super scientific test (AKA paper towel under the unit... ) drove it for 6 miles, no drips or sprays or anything. Must be a very...

Just a quick newbie question. Can't say anything positive, in case I jinx myself but I moved the cars around in the garage and although I didn't see any oil of fluid leaks / drips on the floor initially, after putting water on the floor I did notice it appeared as if there were some oil slick...

I am assuming the military treated this truck like their own personal vehicle, doing proper service to spec... hahaha right! Thanks for your help, I appreciate it.

Great, thank you, I appreciate your help.