Hi Tod,
The big brown/yellow wire is the generator output - it connects to the
battery through a relay in the voltage regulator can that sits by the
fusebox, but internal to the generator it will have a very good path to
ground, through the commutator brushes and the rotor windings. Similarly,
the F (or Field) connection on the generator looks like a short-circuit to
ground, but when the generator is operating, the current that flows through
this circuit is used to regulate the main current output of the generator.
In any event, the generator itself wouldn't cause a no-start situation - you
need to look at the starter wiring and check the functioning of the big
starter solenoid switch on the firewall. Make sure that when you turn the
ignition key to the start position, that you get 12 volts on the white/red
wire that goes to one of the small terminals on the solenoid. If that
happens, then you should get a big 'click' out of the solenoid, and get 12
volts on the big solenoid terminal that connects to the starter. If that
happens and it still doesn't crank, then the starter is dead. You can try to
bypass the solenoid with a booster cable but beware of touching anything on
the chassis or engine with the hot end of the booster cable.
Good luck,
Theo
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