Correct wiring for an alternator

This forum is for the Fordson New Major, including the Super Major and the Power Major.
Post Reply
Jim S
Not Quite Blue Yet
Posts: 5
Joined: Sun Mar 11, 2012 5:52 pm

Correct wiring for an alternator

Post by Jim S »

Hello everyone in Fordson world I have a 1954 Fordson Major Diesel, the wiring harness is in a very sick and sorry state due to much modifying and general hacking about by previous owners so I a going to replace it. My question is as my tractor is fitted with an alternator and the regulator is not needed any more can anyone tell me which wires I have to connect together on the new harness? As the wiring is so messed up at the moment I cannot guarantee it is done correctly at the moment as not much of the electrics work and my aim is to have a fully functioning electrical system at the end of the exercise.

Dandy Dave
True Blue
Posts: 1859
Joined: Thu Apr 02, 2009 2:49 am
Location: Copake, NY

Re: Correct wiring for an alternator

Post by Dandy Dave »

That would depend on the type and brand of alternator that you have. Dandy Dave!
Have a Fordsonful day Folks!

1960 Fordson Power Major

Jim S
Not Quite Blue Yet
Posts: 5
Joined: Sun Mar 11, 2012 5:52 pm

Re: Correct wiring for an alternator

Post by Jim S »

Hi Dave my alternator is a LUCAS not sure what model but it has two terminals on the back one for a standard size spade connector and one for a large spade connector. I hope that will be of some help; it will be nice to have working lights in the future. Thank you for your help and have a good Fordson day. Jim S.

Pavel
True Blue
Posts: 529
Joined: Thu Sep 01, 2011 1:54 pm
Location: Western Australia

Re: Correct wiring for an alternator

Post by Pavel »

To connect up the dash red charging light [exciter] join together, at the old regulator position, the Yellow/red tracer wire to the Red/white tracer wire. The other end of the Red/white tracer wire is then connected to the small terminal on the alternator.
For the main charging circuit, join, at the same place as above, the thickish Yellow wire to the thickish Yellow/red & black tracer wire. The other end of this last connects to the large terminal on the alternator. The other end of the Yellow wire connects to the seriously thick battery side wire of the starter solenoid.
The remaining wire, White/black tracer, is an earth wire and is not needed.
If, now or in the future, you intend to add such things as auxiliary and plough lights, a radio, a fan etc. etc. I would suggest that you dispense with the thickish Yellow joined to the Yellow/red & black wire circuit and instead use a 50 amp wire connected directly between the alternator and the solenoid. This will more than handle the increased output possible of your alternator.
Pavel

Jim S
Not Quite Blue Yet
Posts: 5
Joined: Sun Mar 11, 2012 5:52 pm

Re: Correct wiring for an alternator

Post by Jim S »

Hi Pavel thank you for your help now all I need is My new wiring loom to arrive have a good day. :clap:

Post Reply