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What an exciting time. I think we all remember this point of our first pick up. Your hands are not digging to the bottom of your pant pockets, so you must not have refueled yet. Congratulations and welcome.

I also thought is was part of the ABS system, but wasn't sure enough to say so. Also, the ABS was added on after, so not part of the initial truck schematic. The ABS is fused at 3 amp and 15 amp, not sure which is which. Castle, what 24v / 130a alternator did you use?

My fuel gauge drove me nuts. Ended up being both the gauge and float were both bad. I replaced one, and it did not work. Replaced the other, and did not work. Had good power and grounds. I couldn't understand it. The float on my tank sending unit had a hole and was full of fuel, so it...

Thank you to those that have written here, it is exactly what I am looking for. These are enough success stories to say it seems possible to do without splitting it as long as the vehicle is reasonably level. I am specifically looking for even one person to say they cracked theirs from a...

No equalizer. They run one or two items from the 12v tap. One for sure is the low speed for the heater blower. No power resistors to do so. 24v on high, 12v on low, same motor, single windings. I think it is about 6 amps on high and therefore 3 amps on low. Forgot what the second item was...

Contact Suprman, he has them brand new complete for the price of a replacement cartridge. He is listed in the Vendor section with them. I have bought several things from him, always a positive experience. He authored post #14 above.

I thought the same also at first, but if you look at his second picture, it looks almost up tight against the rear of the pintle hitch mounting castle nut. I also used a Curt u-weld kit. It has side plates, not a bottom mount. It can shift fore and aft with enough load on it, which is...

No poopies about it. It has been done, in production, by the military. Any M939 wiring diagram will show it, and the dash battery switch even has a dedicated pole for it to control its connectivity same as the 24v line simultaneously. People get all bent out of shape and become mostly silent...

I'll post my next update once the adapter arrives, I added the communications bus terminals and wires to my truck harness, constructed a receiving harness connector for the adapter to plug into (below), and have successfully cracked into my controller. Still not 100% sure it will work, but it...

Did you search the existing threads? There are plenty of leads already. Do you want to retain a pintle hitch? Also depends on your 5t, some are different in the rear. Some people have done beautiful work to make their own, some here sell kits, and the best fit store bought one I have seen...

Exactly. So, even though it should only take a few minutes to reflash new pressures into each controller, people can then understand why I am charging them $40 to do so. Here is the adapter for those that want to give it a whirl themself: http://www.nexiq.com/USBLink2

You're fine, I'm not out to get you. Just happened to notice recent activity regarding a 12v topic. At the same time, it is important to set the record straight that it has been done this way, per military design intent, on approximately 32,000 vehicles. The batteries in my M939 series were...

Agreed. Not only communication and setup issues, but all of the "Why does my CTIS not work" questions, of which I actually have zero knowledge of, because mine has always worked and I have not had to do any diagnostics yet. I also don't see a good way to be sure to get the diagnostic harness...

False. The military pulls 12V from 1/2 the battery bank on M939 series vehicles which only have a single 24v alternator.

The cable is the easy part, nearly zero cost and anybody can make it. You would actually only need to add 4-6 wires to your existing harness and then not need an in-line cable. And the software is free also. The $ part is the communications adapter that goes between the laptop and the CTIS...

After a pin-by-pin comparison, it appears the M939A2 type Dana/Spicer CTIS control module itself is equipped with the necessary bus communication terminals, but the harness side of the vehicle is not (terminals not present in CTIS connector). I have downloaded and installed the diagnostic...

Had a low flier in the house last night. Bought an RC copter, my 10 year old daughter was the first to fly it. Went up, over, and into the fish tank full of water and settled on her pet turtle's back with the led still flashing. I have never laughed so hard in my life. It was new out of the...

Whatever the most recently printed spec of your specific vehicle is.

That is in demo mode. It does not know what type of system it is connected to in those shots because it is not connected to anything. Those were taken on my dining room table after downloading the software. I'm making a Y cable and buying the communications adapter. It "should" work, but...

https://m.youtube.com/watch?v=rnbaURrxLjA