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This is how I did mine. The fat wire goes to the plus on the back battery. By back battery we mean that you have two batteries under the seat one sits in front of the other. You want to connect to the + on the battery that sits towards the back of the seat as in the picture.

Interesting, I never thought about that strategy. The vehicle did have 17,000 miles on it which is one of the higher mileage Humvees I have bought from them as it is usually shows much less. I do realize you cannot really go on the odometer reading but nevertheless it was high.

Thanks, that is a very useful document I had not seen it before. Re the "swapping parts", I never did swap any parts I just reconnected all the wires that they had disconnected. Fortunately all the wires had the proper numbers on the silver tabs that made it easy to reconnect everything. I...

I just purchased another HMMWV (M1151A1) and to my surprise this one was also in limp mode just like the one I posted here back in 2020. My initial thought was, here we go again, some more cut wires. To my surprise there were no cut wires just a lot of disconnected wires in the fuse area behind...

Thank you. Worked like a charm. Humvee is out of limp mode, Trans light is now on and she cruises at 50 mph no problem and shifts gear automatically. Why would the government cut these wires. It was cut in such a fashion that it was almost like they were trying to hide the cut wires. The...

I have a 2003 M10445A2 that I have had for a year now and it has been in limp mode since I purchased it from the government. I have had several people look at it, replaced Transmission control module, protective control box, transmission relay, speed sensors and so forth. When I purchased it...