ww2mbjeep

I've installed a replacement wiring harnass in my M52a2 and need help. The fuel transfer pump in on circuit 78, how and where does this circuit get power? What is the circuit number that provides the power?

rcflyer70

I think I have a wiring diagram for the M52A2. I'm heading to work now - will check when I get home (1:00am central) to see if anyone else has provided it to you. If not, I'll try to find it and get you the info.

Brian

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1953 M35 Gasser - converted to dump (6,500 miles driven so far)
1970 AM General M52A2
1984 M915A1
M871
MEP-002
M105A2

ww2mbjeep

thanks in advance

area52

I have tried looking on here and on line but the best I could come up with is a M35A2 wiring diagram and guess on the other stuff that is specific to a 5 ton. On your fuel transfer pump wire, I don't know, sorry.

The M39 series tech manuals are kinda lacking in the schematics.

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Area52's answer to most questions:

YER DOOMED, DOOMED I SAY!!!

ww2mbjeep

I got the M35 schematic, it helps on most circuits but not the transfer pump.

rcflyer70

I haven't been able to locate the schematic. I will keep looking.

Brian

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1953 M35 Gasser - converted to dump (6,500 miles driven so far)
1970 AM General M52A2
1984 M915A1
M871
MEP-002
M105A2

guner51

If you have the complete wiring with the numbers to the wiring it worth its weight in gold. Nobody seams to have it, I mean nobody.
I'm rewired a m52a1 using a m35 wiring diagram and I know the wiring under the dash isn't right.
If you have the hole wiring diagram for the m39 series 5 ton I sure would like one myself .

ww2mbjeep

Guner51, can you help me with the circuit 78 question? I need to know how the transfer pump switch gets its power? Also, Kenny from Houston is changing harness's for his 52A2, maybe he will one day have a diagram?

cranetruck

If it's anything like my 5-ton, the power is supplied via #27 from the master switch to the selector switch for either left (#77) or right (#78) tank fuel pump. #79 is the ground return from the tank(s).

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Bjorn

MEP-018A (needs new generator head)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake and more. (SOLD)
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".

"Some things can't be made better, just differently......a lot of things actually"

73m819

on the m52a1/a2 and m51 a1/a2, the fuel is drawn for running from the left tank only, the right tank feeds the left tank by a transfer pump. this pump is the same one that is the fuel pump for the 109 box fuel heaters

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Ron
Gainesville, Ga.
vietnam-1/66-8/68
42 5t? autocar tractor, gone
43m20, 12t, converted to tractor, gone
52m52, tractor, gone
73m819, tractor/wrecker AKA Wrecked Wrecker
77xm977 10t 8x8, to be a xm 983 sold
What ever else that can be drug home
Use CUCVs, a small step below BOBBERS as wheel chocks
GOD help the MV world if i win the LOTTERY
LONG LIVE BIG GREEN IRON