M38A1 MRC 83 100 amp system

battlecr

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Looking for a wiring diagram for the 100 amp system. I have a 1964 Marine Corps radio Jeep that was partially disassembled and parts missing. I have most the parts for the 100 amp system but need to hook it up to make the unit charge. Any insight would be appreciated. Most the Collins wiring is there.
Don G
 

NDT

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Your 100 Amp system is the early version without the aircraft type Cannon connectors right? Unless you are going for restoration perfection, I would lean towards upgrading to the later version with the Cannon connectors so you get get away from the selenium rectifier which is unreliable.
 

battlecr

Member
275
21
18
Location
Eugene, Oregon
Your 100 Amp system is the early version without the aircraft type Cannon connectors right? Unless you are going for restoration perfection, I would lean towards upgrading to the later version with the Cannon connectors so you get get away from the selenium rectifier which is unreliable.
My Jeep is a 1964, as I understand it mine original had the 150amp unit with the generator, rectifier and regulator in one. What I’m going back with is the 100 amp generator, the later rectifier an solid state regulator. I’m using a wiring harness from a 1952 radio Jeep. My problem is I need a diagram with labels so I can excite the generator so it will charge.
Don G.
 

NDT

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The regulator plug will have one 12 GA wire, that is excite wire, you will probably need to splice that in with the wire that goes to the ignitor.
 

NDT

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The connector you are holding in your hand should have some heavy gauge wires coming out of it and one 12 ga wire, that is the excite wire.
 
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