HMMWV ignition wiring

4x4Guy

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I have an ignition switch and no diagram, ignition switch has letters B, R, S and wires availabe for ignition are 11A, 14A and 29A anyone have knowledge or input where to find this info? looked through TM's and so far found nothing
 

papakb

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You have to have a set of manuals to effectively maintain a HMMWV. They're downloadable off of the internet but hardcopy is the way to go. The information you need is in TM9-2320-280-20-3 on FO-1. 11A to B, 29A to R, 14A to S.

Kurt
 
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NormB

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Holy historical typo batman!

Reanimating dead posts is a hobby or a curse, but I have to ask, IS there a super-secret x-30-3 manual somewhere I'm missing?

I tried looking in x-20-1 through x-20-3, the schematics I've tried having blown up to legible scale with no joy, and at the cost of a couple quarts of oil, a waste of time.

I even looked at modern wiring numbers for M-series vehicles and the resuklts were a little sketchy, indirectly related, not clear at all except for "!!A - ignition switch FEED" I have to assume is HOT, or Battery, but I've also learned you can't assume ANYTHING about wiring on these vehicles, and S3 PCBs are pricey.

I have spent, literally, hours in the manuals - printed and electronic on my computer - online, and here, using the search engine function (marginally effective, still) only to find a single reference to this "problem" with the solution that seems to make sense except the manual says 20A not 29A and I can't find the manual you referred to.

Probably why the OP never replied.

Been a while since I've posted, longer since I asked for any help, but really, does ANYONE have the correct answer for this?

AND where it can be found in the manual?

Thanks.
 

sf1954

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I hope this is what you are looking for. TM-9-2320-280-20-3 (wiring diagram FP-7 or FP-15, last pages of manual). It is hard to read when blown up but is barely legible.
# 11A to B, #29A to R, # 14A to S
Hope this helps.
 

NormB

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D'oh! Transcribing error on my part. 29A NOT 20A, sorry about that, and thanks. The ONLY thing I could find in TM-x-20-2 was on page 4-7, "rotary switch" but it didn't specify which letters on the switch to connect leads.

I have a full - and I mean full, about 5,000 pages worth thanks to my clinic printer - of clean laser-printed manuals, bound and used often; for ready reference I use the PDF files on my iPhone/pad or computer, but THIS one really bothered me.

That schematic thing I gave up on years ago. I have a friend who works as an estimator for a megamillion dollar mansion builder and he has access to a large-scale printer. After spending about $12 at a local Kinko's, another $5 at a UPS/printshop, I asked him to take a look and gave him a thumb drive with all the schematics. He couldn't unpack, scale/print any better than I could a screen at a time on my home computer (which is what I was working with but it's ink-jet), tried this on the laser at work with no joy either.

One would think... with all the people into this hobby with connections, former military mechanics, IT guys, and more, that SOMEONE would have a clear, scalable digital image somewhere that would be making the rounds.

Your eyesight's gotta be better than mine or my friend who reads blueprints and architectural drawings all day.

Thanks for playing.

You win the internet for today.

-Norm
 

Milcommoguy

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Tip of the day.........

B= BATTERY
R= RUN
S= START

Letters are molded / raised near the switch terminals.

Some of guys have that figured out, But thought it should be written.

123 ABC. Now let's hot wire the truck, CAMO
 

KRedd

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TB 9-2320-280-23, Field Maintenance Schematics. September 2013, Distribution Statement -C. Page 53, FO-15 Starter Schematic.
 

NormB

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TB 9-2320-280-23, Field Maintenance Schematics. September 2013, Distribution Statement -C. Page 53, FO-15 Starter Schematic.
Did a search on duckduckgo for: TB 9-2320-280-23 and got exactly nine hits, none of which was for said manual.

Same search in google, first hit was for Army Publication Directorate, but no link in next two pages for actual manual.

Searched for same manual HERE, first two hits were to this post. None of the next three pages had anything related to it. So I did an exact quote search "TB 9-2320-280-23" here - only this thread showed up, online there are 5 links on DDG, 3 pages on google, first two reference APD again, next two pages are linked to overseas data harvesting sites, nothing useful.

Got a source for downloading this somewhere? APD requires an account, and a CAC card (gave mine up in 2006 when I left civil service) to download.

Thanks.

NBScreen Shot 2020-08-12 at 6.29.37 PM.png
 
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papakb

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Hey NormB, doesn't the bible say "Let he who is without sin cast the first stone?" I think resurecting an old, old post with an obvious typo in it might be almost the same thing. :sick:

I went back in and corrected the original type that was TM 9 2320-280-
30-3 that should have been TM 9 2320-280-20-3. Now my mistake aside I see someone else has screwed the pooch and typed TM 9 2320-280-23 that should also have been TM 9 2320-280-20-3 instead, another typo. :rolleyes:

If anything, this should have stirred up some fourth party posting in HUGE LETTERS
RTFM which is the real object of the exercise!

Now let's all lighten up and get back to enjoying our vehicles OK? 🤠

BTW: here's the info from TM 9 2320-280-20-3:

Run Start Switch.jpg
 

NormB

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Hey NormB, doesn't the bible say "Let he who is without sin cast the first stone?" I think resurecting an old, old post with an obvious typo in it might be almost the same thing. :sick:

I went back in and corrected the original type that was TM 9 2320-280-
30-3 that should have been TM 9 2320-280-20-3. Now my mistake aside I see someone else has screwed the pooch and typed TM 9 2320-280-23 that should also have been TM 9 2320-280-20-3 instead, another typo. :rolleyes:

If anything, this should have stirred up some fourth party posting in HUGE LETTERS
RTFM which is the real object of the exercise!

Now let's all lighten up and get back to enjoying our vehicles OK? 🤠

BTW: here's the info from TM 9 2320-280-20-3:

View attachment 808848
And I don't need a microscope to read it. THANK YOU.
 

papakb

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NormB, that message was directed at all those that buy these trucks and then ask "What's a HMMWV" not an experienced old hand like yourself.
 

KRedd

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Hey NormB, doesn't the bible say "Let he who is without sin cast the first stone?" I think resurecting an old, old post with an obvious typo in it might be almost the same thing. :sick:

I went back in and corrected the original type that was TM 9 2320-280-
30-3 that should have been TM 9 2320-280-20-3. Now my mistake aside I see someone else has screwed the pooch and typed TM 9 2320-280-23 that should also have been TM 9 2320-280-20-3 instead, another typo. :rolleyes:

If anything, this should have stirred up some fourth party posting in HUGE LETTERS
RTFM which is the real object of the exercise!

Now let's all lighten up and get back to enjoying our vehicles OK? 🤠

BTW: here's the info from TM 9 2320-280-20-3:

View attachment 808848
Excuse me , but the manual I referenced is actually Technical Bulletin 9-2320-280-23. I have it in front of me at this moment.
 

papakb

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If you have an actual hardcopy of the -23 manual could you scan it and post a link to it here on SS? Googleing it here in the States get's you nowhere as NornB said.
 

Guyfang

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Papabk, the reason you and NormB can not find this TB in the internet, and the reason Kredd can not post it in the forum is the same. Sadly, Technical Bulletin 9-2320-280-23 is coded "C"

DISTRIBUTION STATEMENT C: Distribution authorized to U.S. Government agencies and their contractors. REASONS: Critical Technology, and
Export Controlled. DATE OF DETERMINATION: 04 October 2007. Other requests for this document shall be referred to the U.S. Army TACOM
Life Cycle Management Command, ATTN: AMSTA‐LCL‐MPP/ TECH PUBS, MS 727, 6501 E. 11 Mile Road, Warren, MI 48397‐5000.
WARNING: This document contains technical data whose export is restricted by the Arms Export Control Act (TITLE 22, U.S.C. SEC 2751, et seq.)
or the Export Administration Act of 1979, ( Title 50, U.S.C., App 2401 et seq.), as amended. Violations of these export laws are subject to severe
criminal penalties. Disseminate in accordance with provisions of DoD Directive 5230.25.
DESTRUCTION NOTICE: Destroy by any method that will prevent disclosure of contents or reconstruction of the document.
 
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