3 lever light switch function breakdown

Fes001 · Post by **Fes001** » Sun Dec 30, 2012 3:38 am

Hey Guys,
I am looking for any breakdown of which wires get power at each position of the switch. For example service drive would make wires 21,22,75 hot and so forth... I am wiring my dads 52 m38 for him from scratch and would like to not overlook simple things and have to solder more than I need to.

Thanks
Jeff

Bretto · Post by **Bretto** » Sun Dec 30, 2012 7:14 am

This might help you out.
http://willysmjeeps.com/downloads/M38wirecolored.jpg

Post by **Ryan_Miller** » Sun Dec 30, 2012 9:28 am

You also might give Joe Hall of Vintage Wiring of Maine a look. He makes excellent reproduction wiring harness with the corrrect ends.

He is also a big M38 guy and just finished a refresh on his M38 last year for the MVPA national.

Post by **wesk** » Sun Dec 30, 2012 10:12 am

You can certainly use the excellent resources available right here to answer those questions.

http://www.willysmjeeps.com/v2/modules. ... php&page=1

Look closely at the chapter I loaded from the Bendix service TM 9-1825E on the light switch.
http://www.willysmjeeps.com/v2/modules. ... _album.php

For later single plug light switches just ignore the plug and it's wires on the right.

Fes001 · Post by **Fes001** » Sun Dec 30, 2012 7:29 pm

Thanks guys!! I'll check out all the info tonight...
My dad purchased a cannon plug with leads from vintage, but spending 700+ on a harness was out of the question.

Post by **Ryan_Miller** » Mon Dec 31, 2012 4:43 pm

Well worth the money, it is a good product. Having a correctly wired and insulated harness is important for 24 volts.

I was test running my engine one day and the positive lead for the horn touched the body - that lead is always hot.

24 volts melts stuff quickly! Fortunately I was right by the battery and cut it off before it could melt very much.

Fes001 · Post by **Fes001** » Wed Jan 02, 2013 4:11 am

Ryan, no doubt that vintage does great work. I should have given some background on the jeep... Previous owner installed 2.0L Pinto motor. It was already 12v, but the wires were a rats nest! I simplified it with a one wire alt, and points eliminator kit, with a internal ballast coil. Minimized wires and components for my dad. Plus doing this project together is good for the old man and I.
Jeff