Reward for lost Kraken!
Join Date: Apr 2006
Thanked 141 Times in 138 Posts
Rep Power: 11
Steve, your instincts are right on this. Having wires tied and teed and not used is simply quick & dirty, and setting it up with a few more feet of wire and five bucks worth or parts to get it producing power right away is a better way to go.
I wouldn't try to guess what voltage it wants to see on the exciter, but would try to find a schematic for that particular model number. From Hitachi or the folks who sold you the alternator, you should be able to dig something up. Heck, you might be able to find out which bulb they usually use, and simply add a bulb+holder into your panel so you have a charge warning light too!