Lost in the Sauce

Well, I've got my alternator in. The universal bracket was a pain in the @$$ and I had to fab up a tensioner arm, but its in. Now I'm lost. I've been reading over the various articles concerning alternator wiring on and off for about a week now. I now know, or think I know, how to wire up the alternator in either the 1 wire or three wire configuration, but my questions are:

1. How do I know if I have a Delco 10si or 12si?
2. With the alternator do I eliminate the voltage regulator? If so, what do I do with all those wires?
3.Where do the old generator wires go to now?4
4. Can I just use the stock "AMP" light for a dummy light with the alternator?

BTW I have a stock '63 CJ5 with a 134 and new (but stock) wiring harness.

Please help me, I'm drowning here!

Josh

 

If you have an internally regulated alternator, an external regulator will not be needed.

How to tell, I can't answer, but I do know that it might not be a good idea to use the stock Amp light.

They are known to cause dash fires.

 

I do know that it is an an internally regulated alternator but I don't know where all the wires hook up to that used to be on the regulator and generator. Do these just get "deleted"?

 

Go to the "search" feature and the info is there. Type in one-wire alternator
or something to that effect. You can find diagrams and loads of information on the subject.

 

If you do have a one wire internally regulated alternator the small wire goes directly to the battery, and the big wire to the starter. the wires to and including the voltage regulator get deleted

 

check out madelectrical.com. loads of info on how to differentiate between the alternators and the proper way to wire it up. look in the tech section. easy peasy.

 

Theres are great instructional article on the 3b page regarding 12 volt conversions

 

Theres are great instructional article on the 3b page regarding 12 volt conversions 6-Volt to 12-Volt Conversion on The CJ3B Page

 

The 10si has a "normal" type looking fan. The 12si has a smooth front disk with paddles on the inside.




that was how I wired in my 12si in a nut shell. I put a diode coming of the number one wire, it's supposed to cancel any feed back that you may get from the alternator (It came from Radio Shack and it's part number is 276-1143) I hooked mine in to the factory amp light on my '73 and had a Voltmeter in there too.

 

Sweet! Thanks! This really helps a lot! Hopefully I'll have it back runnin' tonight!

Josh

 

Hey Josh,
I really suggest you look at the madelectrical.com site like Jeeper24 said.
The diagram above will work but there is an improvement that will help regulate the output voltage of the alternator to compensate for the resistance of your wiring harness under heavy load.
The madelectrical site explains it well, and the mods they suggest will give you brighter lights.

Don

 

Concerning the above diagram, I have always wired both terminals through the ignition switch so when it is off, there is no juice going to the alternator other than the battery lead. The battery lead is a matter of convienence and can be routed to the starter, directly to the battery, or even to the winch lead. Minimum gage on that should likely be 6 but depends on the alternator amperage. Realize that the battery lead wired that way is always hot and in most installations is unprotected. I have been using Bussmann 120 or 150 amp marine breakers on those. If you do get a short on that lead and it is unprotected, there is going to be one rather brightly glowing wire under the hood.

 

Thanks for the help guys! I got her running Saturday night and drove her around on Sunday. She drove like a champ with no hitches. I appreciate all of your help!

Josh