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You might be able to get another circuit film at LMC truck. See if this link works for you. https://www.lmctruck.com/interior/dash-components/csb-1981-90-printed-circuits-and-retaining-clip

That doesn't make sense.

That's a diode. I read someone's post about that and they said it was 1.5 amp but I don't know about the voltage rating. I'll try to post the link to a good discussion on these boxes. https://www.steelsoldiers.com/threads/pcb-eess-smartstart-s3-i-pics-info.164930/ Good luck.

Check the glow plugs.

M923a2 Coolant System Drain and Flush: Check out that posting. I don't know how to link it here. Just do a search for it and see if it comes up. Good luck.

These are the instructions I got when I had my 700R4 rebuilt. See item #3.

I changed the primary fuel filter/strainer on my M923A2. I filled up the canister almost all the way and was surprised that the truck started right up and kept running after I replaced it.

Glad you got that cap off. I just thought of this that might help you next time. This is an impact driver that you use with a hammer. It works real good for taking off stuck straight head and phillips head screws and such. You can get one at HF or just about any place that sells tools. You...

Pictures?

I didn't have a filter wrench big enough for the lube oil filter so I used my belt. Worked great.

Now that the temps here are cooling down, I changed lube oil and filter. Didn't see any oil drain plug gasket, not in drain pan. I used teflon tape on plug. Hope it doesn't leak. Will do trans and fuel filters next.

Thanks for all the pics.

Thanks for the reply Jinx. Now I know. That little aluminum plate is very important!

I don't own a hmmwv but someday I might. Was wondering if the serial and vin numbers were only located on a rivited plate located on the outside of the vehicle or other places. Is there only one place with those numbers or someplace else like on the frame? Thank you for any info.

Get an inline water filter like for swamp coolers.(y)

Check the windings with ah ohm meter with one probe grounded to the solenoid body, separate from the truck ground. You want to see if there might be a short in the windings. There should be infinite ohms, no continuity. If there is some, that means there is a short and pulling down the...

Try checking the windings to ground, the solenoid housing. Maybe a short in winding?

What's the resistance in the solenoid windings? Is there a spec of what it should be?

Maybe check continuity on that electromagnet where the wires would connect. Can't see in the pic.

Could you change out your front bumper?