i just put in a powermaster delco 12si alternator in my 70 ss i ran the 1 wire right to the + battery. what do i do with the rest of the wires that went to the old alternator? can i take out the external voltage regulator? what are those other wires for? does anyone have a drawing on this set up and what to do?

That is my next project. I bought the full electrical kit upgrade from madelectrical, part of this kit includes upgrading the alternator. Here are a couple of web site links that may be helpful although I have not read them thoroughly but there are some diagrams on what you're looking to do. Please keep me updated on your upgrade as I am looking to do this same shortly.

http://www.madelectrical.com/index.shtml


http://www.chevelles.com/forums/newreply.php?do=newreply&noquote=1&p=591324

1 wire alternator :sad: If the car is all stock it may be ok but if you have any high draw items like a amp, electric fans, electric water pump ect... use a 3 wire alternator. The advantages are better explained here http://www.madelectrical.com/electricaltech/onewire-threewire.shtml
Also if you have a idiot light or the amp meter it will no longer work. If your alternator stops charging you won't know it till the battery goes dead unless you have a voltmeter and keep a eye on it. I had the one wire and always had low voltage when the high draw items were on. Now its 3 wire for me.

Did you contac Mad electrical tech? Did you ask them if the 1 wire is what you need for your application. I think they do not recomend the 1 one wire deal. If you haven't give them a call.
Good luck

You can disconnect the regulator and just tie up the wires. They aren't used. You could also remove the connectors and all the wires but the brown one from the firewall connector.

Now, if you want to charge light to work, you should be able to take the brown wire that went to the regulator and run it to one of the terminals on the alternator. I can't remember for sure but I think it's the #2 terminal. The alternator should have come with instructions detailing where to connect the wire if it's possible. If there were no instructions I'd call them to check. Hooking the light up gives you the light (obviously) but it also eliminates the need to rev the engine when first started to get the alternator working.

Peter