[Willie Krash]

Thanks.
I might add if the diode fails just touch the #1 or R terminal to battery for a second, like polarizing. It will continue to charge as long as the engine is running. If B+ is applied the #1 or R it will create a drain if the car is not running, be aware of that.
Once excited the trio will feed the VR. A small bulb will work in place of the diode. The #1 or R terminal is an output and if it see any load above 3 amps it will kill the diode trio in the alternator, a simple repair.
As to the #2 or F terminal it is just a sense terminal or a reference as to the battery state of charge. I only bring up as many people here have modified cars. T-Bird is quite right, loop it back to the alternator (machine sensed), but for those that have a battery in the trunk tie #2 or F directly to the battery (battery sensed).