[FC] alternator installation?

[Wild8bill at aol.com]

I have a "one wire" internally regulated alternator, and need a wiring  
diagram (!). I have tried the obvious ground and a single wire to the battery,  
but get a power drain back through the alternator when key is off. I 
connected a  relay to only allow the alternator to pass a current when key is on, 
but  alternator is producing 18 volts, which is too high and will damage 
circuits. I  have not attached the former "gen/oil" dash light wire because I 
don't know  which lug to go to, R or F. would that wire then reduce the 
output to an  acceptable 15 volts? And wouldn't the whole "one wire" thing be 
incorrect if I  have to hook up other wires to make it operate correctly?
 
Anyone experienced with putting one of these on their truck who can give me 
 some instructions or a link to a schematic would be a great help.
 
Bill
Richmond CA
61 rampside
63 greenbrier
63 monza convert
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