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Yes there is an engine block to frame ground near the starter IIRC. The chassis to cab cable is behind the grill on the passenger side. The chassis side of the cable is unreachable.... you will see. I haven't had an issue with it yet but my plan is to simply add a second braided ground strap...

I agree this is the *best* method but also feel I should point out that the CTIS harness removal and installation requires that you pull the HVAC/Heater box out since the harness routes behind it. Also not every truck has the same harness since the option pins that set the module's pressure...

Prime example of why it is imperative to clean every connection. That is VERY LIKELY factory. I've run into a severe voltage drop between the cab and the chassis on a 2021 A1P2 due to excessive paint under the cab to chassis ground strap. You are starting to see the situation you are dealing with.

There's two so the system can drain when it's not on a level surface. Rather than make it more complex than it needs to be - why not reach out to Red Dot first and ask them?

That's how I mounted mine.

You are absolutely correct. Appearance means nothing. The military will not mount anything over 7 years old and will not run anything over 10 years old except as a spare and even then it will be slated for replacement as soon as is practicable.

Perhaps. You might call Red Dot and see if they have some and would sell smaller quantities. They are in WA state and pretty helpful from what I have heard.

4710-01-574-3832 Red Dot #RD-5-1194-0M I would call Red Dot. They have been the only supplier to the military for that particular part since it was assigned a NIIN in 1999. Guessing they have them specially made for their specific application because I can't find anything like it in the...

The disconnect relays are a known issue. Cooper-Bussman makes a fully enclosed replacement: https://www.ebay.com/itm/256200723752

IDK - my experience with "Delco" in my GM travels is that once they stop using the stuff in high volume new manufacturing and for warranty and service replacements, the major (quality) manufacturers stop producing the parts and Delco will then "fill out" their catalog with Chinese crap. Lots of...

C7 engine computer only draws 1.1 amp at 24v. Like Ronmar said - it's the lighting that's killing the batteries. I figure if you ran during the day with only stop lights you could likely go the full range of a stock fuel tank - at least I'm positive I could on my four Hawker 6TAGM's. Recharge...

That truck wouldn't have the air lines because it didn't originally have the C7. The air lines to the MMDC are not part of the electrical harness so probably haven't yet been added. They originate from a T off the primary and secondary air brake supply lines going into the pedal valve. The T has...

Click on the "PDF" link under download options. It's not going to be searchable. The images dumped into the PDF haven't been run through OCR and I'm not sure all of them are high enough quality for that to work reliably. They are generally good enough for someone that can read schematics. It's...

That was a Portland problem - really just downtown Portland at that which is a comparatively small area of perhaps a 20 block radius.....and quite entertaining actually. In the same way you can't look away from a Train Wreck. The crazies have taken over the city much like they have many other...

I have all the wiring diagrams for every model - and all the other documentation in the TM's, etc. What is your serial number and what are you looking for? Here's a collection of A0 through A1R schematics I put together. It covers most trucks: https://archive.org/details/fmtv-schematics-a-0-a-1-r

All versions of Dexron are backwards compatible with all previous versions. The US Army currently uses 15w40 in older trucks (they never flush them to change the fluid type), and both synthetic blend Dex VI and full synthetic Dex VI in newer trucks (all the A1P2 FMTV's use Dex VI). It's up to...

As a shop owner, professional master technician, Motorpool veteran, and LMTV owner. This is my perspective. 1. In general, most people forget about transmission maintenance unless something prompts them to consider it. This is very often some sort of "behavioral" problem they perceive...

They can go out of spec and also get debris in the seat, etc. The relief valve on my air dryer got some rusty crap in it and started leaking and I found out through some research that Haldex had increased the pressure of the relief valve on these dryers so I changed it out to the new spec. I was...

If you haven't rebuilt or replaced all the wheel valves that could easily be the problem. They are typically NASTY inside. I would also replace the PCU relief valve and rebuild the PCU if it hasn't been. It requiring adjustment is a great troubleshooting step but ultimately this indicates to...

What did you end up doing for that error again? You might want to replace the relief valve or try a whole different PCU since I have never seen that problem with any other truck. My system works flawlessly on my '08 A1R and I've never had to press a mode button more than one time.