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Re: Nuffield Universal 3 Wiring Overhaul schematic


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Posted by Steve@Advance on January 03, 2016 at 14:26:33 from (107.203.134.67):

In Reply to: Nuffield Universal 3 Wiring Overhaul schematic posted by KlemKadid on January 03, 2016 at 08:59:12:

The problems I see:

1. The brown wire on the starter solenoid. This terminal is not a ground. It energizes the starter, should
wire from the "start" position of the ignition switch, or a separate start button. It must also have a
neutral safety switch or some mechanical interlock to prevent starting in gear.

2. There is no engine kill circuit. Being a diesel there may only be a kill lever, but there may be a run
solenoid. As the diagram is shown, turning the ignition switch off will not stop the engine.

3. This is just a preventive recommendation, move the yellow alternator wire to the starter connection.
This will get it away from the corrosive battery.

The question about the red wire...

Are you asking about the wire that is colored red in the drawing? If so, that is the horn ground.

Or are you asking about the wire circuit labeled red in the diagram? That circuit powers the side marker
lamps and the switch for the tail light and rear flood light.

For wire sizes, I would recommend the yellow wire from the alternator and the wire from the starter to the
ignition switch be # 10. The rest can be #14 or #16 stranded.


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