M1097R1 No start

[osteo16]

If your wait light goes out, and you here a faint clicking.. I’m going with starter solenoid .. Need a helper to crank whilst you tap the solenoid..

 

[Sandog]

Do the dash lights go out when you try to start it?, if you have something close in front of the truck turn on the head lights (if the batteries/battery connections are even good enough to burn the lights) , watch the reflected light and see if they go out when you try to start it.
Are these the original military batteries?

Yes originally

Start with the basics, download the TMs so you have a schematic, grab a volt meter and just start troubleshooting, if you do not have experience troubleshooting automotive electrical systems this is really not the one you want to learn on, you should get some help.

First thing is inspect all the wiring from the batteries to the dash panel, check/clean the grounds, behind the inst. panel, back of the engine and the cabling between the batteries and starter are a few places to look, you could have radio cables that are cut (just one example) and you need to secure/disconnect those first!

Disconnect the batteries any time you are working on the electrical system!

Be very careful 24V is a different animal than 12V a short on a 24V system can bring devastating results, wear your PPE while working in the battery compartment at a MIN.

A good inspection can often uncover many issues.

where is the best place to download the TM’s?

 

[Mogman]

Yes originally

where is the best place to download the TM’s?

HMMWV Technical Manuals, If you need it it's here!

If you need to know it, it's here! EDIT, the original link from the OP is no longer valid (stuff changes yes?) Here is a link from rolling18 https://www.nsnlookup.com/equipment-intelligence/land/hmmwv Here is a link to some of the newer manuals...

www.steelsoldiers.com