motrola alternator on jd 1020

RLH22 · Nov 4, 2014

how do I go from 4 wire Motorola alt with seperate voltage reg to a gm 1 wire alt thanks in advance

Tx Jim · Nov 4, 2014

After mounting one wire alt run a wire from post on alt to the top post on starter solenoid. You could insert a volt meter in between alt & solenoid if you so desired.

teddy52food · Nov 4, 2014

I think you mean ammeter don't you?

Anonymous-0 · Nov 4, 2014

(quoted from post at 15:04:33 11/04/14)
After mounting one wire alt run a wire from post on alt to the top post on starter solenoid. You could insert a volt meter in between alt & solenoid if you so desired.

es, he could insert a voltmeter in that wire but it won't charge. It would charge if he inserted an ammeter though. :wink:

Tx Jim · Nov 4, 2014

(quoted from post at 21:55:08 11/04/14) I think you mean ammeter don't you?

A voltmeter or amp meter will both be just fine. I seriously doubt your vehicle(car/pu) haa an amp meter.

Janicholson · Nov 4, 2014

Volt meters go to ground from hot (switched is best. Putting it in series will just not work at all they have very high resistance. An amp meter will be the only one placed in series. and that is a poor place to put it as it will never show discharge. It should go between all accessory and load and the battery (except the starter motor) Jim

teddy52food · Nov 4, 2014

The hook up is what I was getting at. Your statement would be for an ammeter.

Tx Jim · Nov 4, 2014

Thanks for correcting my mistake.

J. Schwiebert · Nov 4, 2014

Interesting, We have a 4020 with the Motrola. I need an isolation diode for it. Deere told me yesterday NLA. I have been thinking about changing it if I can not find one at some electrical service shop, but I want to stay 3 wire and I need a way to power the idiot light.

JMOR · Nov 4, 2014

(quoted from post at 18:05:42 11/04/14) Interesting, We have a 4020 with the Motrola. I need an isolation diode for it. Deere told me yesterday NLA. I have been thinking about changing it if I can not find one at some electrical service shop, but I want to stay 3 wire and I need a way to power the idiot light.

robably one out there somewhere. But if worse comes to worse & you insist, you could pick out one of these left most diodes & bolt it to a heat sink & wire it up. More than one way to skin the cat.

JDemaris · Nov 4, 2014

Those isolation diodes are common, cheap, and easy to get. American Motors also used the same ones on cars. NAPA sells them, as most other auto parts places do. They come in single diode units and dual diode units.

JDemaris · Nov 4, 2014

Here.

ss55 · Nov 4, 2014

Dumb question: Why not use another Motorola unit or a 3 wire alternator?

I thought the main advantage of using a one wire alternator was the ability to use the simpler wiring on older machines at the cost of higher rpms are needed to excite the unit to start charging. A one wire alternator on a fairly modern tractor that already has a three or four wire harness sounds like a step backwards.

motrola alternator on jd 1020

RLH22

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