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Old 04-13-2007, 06:36 PM   #1
GM72K10
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24V to 12v change over

After looking at how hacked up the dash wiring is in my 85 M1028a1 (Military K30) and needing batteries any way . . . How involved would converting the 24volt system to 12 volt? Anyone here done this? Engine harness change and dash wiring change plus starter. Anything else? Found a complete GMC 6.2 one ton auto 3500 in a yard , should have everything for a swap. Note, this K30 has 2 100 amp alternators, I suppose they would have to go to also. thanks in advance
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Old 04-13-2007, 06:44 PM   #2
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Re: 24V to 12v change over

You might take a look at www.steelsoldiers.com You can find great info on a wide variety of Military vehicles.

I would like to have a CUCV, of a 5ton wrecker (M816) or a 5ton with box van on the back and make a camper out of it..
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Old 04-13-2007, 06:53 PM   #3
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Re: 24V to 12v change over

Yep, going there next. thanks
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86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump
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Old 04-13-2007, 07:05 PM   #4
Rc 415
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Re: 24V to 12v change over

if u do swap it all out i would like to get my hands on the brackets so that these trucks can hold 2 alts...
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Old 04-13-2007, 10:23 PM   #5
Srubydo1986
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Re: 24V to 12v change over

Just a thought but if it anything like going for 6v to 12 id say it the alternator/generator, The started and light bulbs. I think harness wiss they are the same for 6 to 12 but 24 to 12 i dont know.
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Old 04-13-2007, 10:44 PM   #6
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Re: 24V to 12v change over

Found this out: Wiring harness is 12 V, alts are both 12V, all dash and vehicle lights are 12v. only starter is 24V. Looks like rewiring of batteries and removing/rewiring of one alternator and changing to 12V starter should do the trick.
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86 K30 CUCV M1028a2 dually
86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump
More square bodies and CUCVs than I care to admit to
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