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willysmjeeps.com :: View topic - M38 Main Wiring Harness install under dash mounting
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M38 Main Wiring Harness install under dash mounting

 
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rgmutchler
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Joined: Sep 28, 2008
Posts: 344
Location: Caldwell, Texas

PostPosted: Sun Apr 05, 2020 4:27 pm    Post subject: M38 Main Wiring Harness install under dash mounting Reply with quote

While installing the main, ignition, and gauge wiring under the dash it doesn't seem there are any mounting looms to hold the harness up under the dash. I have noticed that by using the choke and/or throttle cables I can go above them or use a zip tie to them. But I can't find any diagrams or info on attachment points for the harness.

Are there any or does the stiffness and short distance negate the need for any loom connectors under the dash.

Thanks
Ralph
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R G Mutchler
M274A5
M-38 MC13312
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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Sun Apr 05, 2020 9:06 pm    Post subject: Reply with quote

I have never seen any parts lists with any clamps or supports for the wiring behind the dash except for the radio power lead by the cowl battery box and the clip retainer bracket on the back of the instrument cluster for the two metal connectors for the dash lamps and Hi-Beam connectors. From my experience once the connections are all made and one wire ties the harness together about every 6" to 9" it is self supporting and at most needs a little chaffing protection where it tends to rub on anything


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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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rgmutchler
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Joined: Sep 28, 2008
Posts: 344
Location: Caldwell, Texas

PostPosted: Sun Apr 05, 2020 9:37 pm    Post subject: Reply with quote

Wes,
Thanks, just wanted to make sure I wasn't missing something.
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R G Mutchler
M274A5
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MarkR1951M38
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Joined: Aug 22, 2016
Posts: 117
Location: Huntsville, AL

PostPosted: Mon Apr 06, 2020 4:14 pm    Post subject: Reply with quote

I haven't seen any documentation on routing under dash wires. I used small wire ties and tied together groups of wires just to hold them from flexing and chaffing on other wires or surfaces....but a few stragglers still exist.
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1951 M38 MC 22731
(Converted 12v, Carter WO carb, single action fuel pump, electric wipers)

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RonD2
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Joined: Oct 02, 2014
Posts: 1887
Location: South Carolina, Dorchester County

PostPosted: Mon Apr 06, 2020 4:43 pm    Post subject: Reply with quote

The plastic cable ties we know today were invented (patented) in 1958. Very Happy
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Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
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MarkR1951M38
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Joined: Aug 22, 2016
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Location: Huntsville, AL

PostPosted: Mon Apr 06, 2020 5:32 pm    Post subject: Reply with quote

My M38 is 12 volt...so not really worried about being 100 % authentic, especially when you can't see under the dash. Mine is a driver and parade vehicle, but definitely not an authentic historic model.
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1951 M38 MC 22731
(Converted 12v, Carter WO carb, single action fuel pump, electric wipers)

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RonD2
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Joined: Oct 02, 2014
Posts: 1887
Location: South Carolina, Dorchester County

PostPosted: Mon Apr 06, 2020 7:40 pm    Post subject: Reply with quote

Hi Mark,
Except for the parade vehicle part, my M38 is the same as you described yours.

I was just putting out some trivia for those that might be interested. Didn't mean to confound the topic. Even though plastic cable ties came about in 1958 for the aviation industry, I suppose they could have made it into Army supply inventory while the M38 was still in service.

My point being I believe it's ok to use white or black cable ties today on the M38 and still be "correct" for a motor pool restoration. I don't have any photos or evidence to prove it to the jeep police, but I use a few out of sight under the dash myself anyway. Very Happy
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Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

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Stiknruddr
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Joined: Jul 28, 2017
Posts: 52

PostPosted: Thu Apr 09, 2020 5:22 pm    Post subject: Reply with quote

Same I used a M170 surplus harness modified it with hardware from Saturn surplus and wiring harnesses off eBay. 12 volt. But... I did put the gun mount on it properly and shoot my full auto Browning 1917 off of it. https://vimeo.com/406037439
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