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transmission reset

GuntherRommel

GuntherRommel

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Yesterday I was driving home from the gun store and I was stuck in limp mode, got home and noticed there was no trans light at start up. So I decided to bypass the reset and it worked fine. I want put a inline fuse and get rid of the reset. I know it is 12 volt but do not know how many amp fuse to put in? Does anyone know what amp fuse to put in to safely protect the TCM?
 
BLK HMMWV

BLK HMMWV

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I have to ask , you did try to reset it first before you cut it out of the system?
Why not just stick with the factory set up?
Why did it trip or blow?
 
Retiredwarhorses

Retiredwarhorses

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GuntherRommel said:
I am not sure what is going on the reset does not reset, but works fine if bypassed. Nothing looks corroded
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use a multi- meter to determine if the breaker is open or closed, but yes…you can bypass by jumpering the 2 leads together, but maybe the breaker is working as designed and you truly have a short that is blowing the breaker?
I mean..,if this was your house and you had a blown breaker at your electrical panal, would you use a piece of 10ga wire to bypass the fuse that keeps blowing?
 
4x4nutz

4x4nutz

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Same thing. This time I replaced the breaker, the TCM, and I made sure the TCM was getting power. Then I just bypassed the breaker. Still in limp mode. 1997 M1097-A2.
 

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GuntherRommel

GuntherRommel

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4x4nutz said:
Same thing. This time I replaced the breaker, the TCM, and I made sure the TCM was getting power. Then I just bypassed the breaker. Still in limp mode. 1997 M1097-A2.
Click to expand...
This little guy was my problem, its right next to the breaker. I could not get any codes because the trans light was not working, luckily had a spare laying around 20230316_134410.jpg
 
Mogman

Mogman

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4x4nutz said:
Don't have a way to check for codes....
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I had my NAS crash so I cannot locate the supplemental troubleshooting guide, I think I have posted it for you before. (someone?)
All you need is a piece of wire to get the codes.
If you have no trans light you ether have a bad light or you have no power to the TCM, a bad TCM, or something in between (wiring)
You need a working (comes on when the start switch is put to run) trans light to go any farther, if you have no trans light it is possible when you figure out why you will have figured out the problem.
 
4x4nutz

4x4nutz

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GuntherRommel said:
This little guy was my problem, its right next to the breaker. I could not get any codes because the trans light was not working, luckily had a spare laying around View attachment 893296
Click to expand...
Had a new one...still not working. Transmission light still has not come back on. Re-checked battery wiring. All is good. TCM is getting power. FYI - I appreciate all the help.
 
4x4nutz

4x4nutz

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Mogman said:
I had my NAS crash so I cannot locate the supplemental troubleshooting guide, I think I have posted it for you before. (someone?)
All you need is a piece of wire to get the codes.
If you have no trans light you ether have a bad light or you have no power to the TCM, a bad TCM, or something in between (wiring)
You need a working (comes on when the start switch is put to run) trans light to go any farther, if you have no trans light it is possible when you figure out why you will have figured out the problem.
Click to expand...
I found it. And I am going over everything. TY!
 
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