Posted: Mon Nov 14, 2011 8:40 pm Post subject: Sending unit 24v to 12v
I am going to convert my M38 from 24 volt to 12 volt. Does anyone know if the sending unit from the civilian CJ 3 will work in my fuel tank? Obviously, I would need to change the gauge as well. Thanks!
Joined: May 10, 2010 Posts: 615 Location: North Yorkshire, UK
Posted: Tue Nov 15, 2011 1:18 am Post subject:
In theory, yes. The CJ3 sender won't have the douglas connector on it, though.
Also, be aware that the M38 fuel tank is about 1-1/2" taller than a CJ3 tank, so you'll have slightly more fuel in the tank than your gauge will show (no bad thing).
Wbr,
Owen. _________________ Owen
1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
MVT # 19406
It is best to buy a brand new aftermarket 12 volt fuel gauge/sender set. They have adjustable senders and they can be set up to give very accurate indications. And of course they are a matched set electrically.
The sender screw holes in the M38 tank are laid out different then CJ3A tank.
You will have to accommodate this difference no matter which sender you use. This is best done by re-drilling the sender to match the existing M38 tank screw pattern. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Start with the two most popular brands, VDO and Autometer _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Also watch out for the direction of swing on your float. And remember to match whatever float you use to the matching gauge. A later cj float from the single large rounf instrument cluster will make this difficult to do. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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