That's an interesting take on it!

gfl is mentioned a lot in this post. It was suggested it was actually gfi but I found on line references and it was definately GFL and Not GFI. One must try to figure out what are GFL batteries. I am guessing it is Government Funded L??????. Perhaps Logistics?

Here's the advance curve sheet for the IAU-4007UT. It uses curve # 770. Here's a link to a downlaodable copy of TM 9-1825B AutoLite electrical Component manual dated 1952: https://www.scribd.com/document/5182534 ... -Auto-Lite

The IAU4007UT distributor is listed in the M37 ORD 9 SNL G-741 date 1954. The IAU-4005UT is also listed but for the 1st sn thru engine serial 20934. The IAU-4007UT starts at eng sn 20935 and on. The specs for both and advance curves are in the old 1960's AutoLite/Prestolite Service Manuals. The Army...

Find a shop with a real coil tester and check it out correctly. The primary & secondary Ohm readings will give you an idea on condition but the more reliable method is with a Coil & Capacitor test set. Also when taking the ohm readings be sure take both readings with the coil both cold and h...

My bad. Didn't see "continuous" after 175 A.

That's an intermittent rated switch. You need a continuous duty switch. Another option is to used a low amperage keyed dash switch and a remote continuous duty sealed relay. In aviation business this would be called a master switch that controls the master relay. These sealed 24 volt relays are easy...

Hello Bert! Been a busy summer!

That will work but a word of caution, make sure that it's written somewhere so some good old buddy doesn't try to start the truck and run the battery down cause he wasn't aware of the extra switching.

M37 = ORD 9 SNL G-741 M38 = ORD 9 SNL G-740 M38A1 ORD 9 SNL G-758 M101 = ORD 9 SNL G-748 The period during which the ORD 9 SNL series of parts manuals existed was also the period of the use of the military vehicle G numbering system which can be found in a copy of the military vehicle G list listing...

Jim, The M37 had a circuit breaker for the horn and a circuit breaker for the lights. The M37B1 had a horn circuit breaker only. The later model light switches had the circuit breaker built in. On both: The instruments were unprotected right off the ignition switch (except early M37 thru SN 80037412...

Any particular one? WWII MBT or Bantam T3 plus about 7 other WWII makes, post war Civvy Bantam T3-C, 1950's M100, 1960's M416. They were each designed to fit behind certain model jeeps.

I suppose "WISE" would depend on several things:

wallet
tool box
test equipment and adapters
technical competence
type of restoration IE motor pool or factory original or daily driver

The M101 for the 50 to 53 period would be a perfect match but are hard to find. The M101A1 from about 54 and up to about 68 would work just as good and from there on you must be careful which M101XX series you pick as the wheel and tire and the brake system changes.

From about 1941 thru about 1956 the ORD stock number was the system used to stock spare parts for everything the military owned. In the mid 50's they started the switch to the Federal Stock Number (FSN) system (XXXX-XXX-XXXX format). Then again in the 70's they modified the FSN to the National Stock...