M wiring to Ameter and switch

[CELSESSER]

Hey Guys,
A question on ameter and switch wiring on an M. Helping a friend get his M running. Replaced the smashed gauges and have it running nicely. I am not getting any deflection on the ameter-starting,lights,running- nothing. The generator was checked and is putting out juice. The cutout is mounted on the generator and the one wire from the gen goes to the one pole of the cutout. The other pole of the cut out is wired to pos side of the ameter. the neg side of the ameter is wired to the starter Pos terminal(through the ignition switch, ie the same terminal on the switch that goes to the Pos terminal on the starter.
I think the ignition switch wiring has been changed but from the parts diagram I cant tell what is supposed to go where!
Anybody have a diagram of the switch and ameter wiring??

Thanks

Chuck

[JD440ICD2006]

Chuck,

Sounds like the wiring has been "reengineered" like many of them. The first sign is that the cutout relay on an M goes in the dash pedestal, not mounted on the generator like later voltage regulators.
Also, since it is a cutout and not a regulator, the switch must be correct because the operator controls high and low charge output.
For instance, if you have just cranked it and/or you are running lights, you run the switch in the high output position. But if not running lights and been running a while, you switch it to the low output range.
Oh what a step forward the voltage regulators must have been back then. They do all of this automatically, when they are working. LOL
I have a diagram somewhere of the original wiring. I will look for it and find a way to scan it and post it.
It is easy and straight forward so don't go pay 5 prices for a ready made "wiring harness" unless you just have some extra money you don't want to carry around.

Chuck W.

[CELSESSER]

Chuck W,
If you can scan it and send it to me in a PM that would be great. Yes these harnesses are pretty simple. It's just understanding the differences in generators and what a cut out does versus a voltage regulator has been a learning experience. This M has a 3 brush single wire generator with the cut out. The ameter was disconnected (smashed) and one of the poles on the switch is dead(off, ing/no lights, ign/lights, off). I don't like having to try to piece something back together that someone else took apart!

Thanks!

Chuck

[Swawpy]

Chuck W- If its easy enough I would love to have the diagram also. I have struggled with the same wiring issue before, and cant remember now. It would be great to print and keep a copy.

Thanks

Swawpy

[JD440ICD2006]

Still looking for that JD M wiring diagram. It may be at the farm, I can grab it this weekend.