View Single Post
Old 05-29-2009, 11:07 PM   #4 (permalink)
Master EcoModder
JacobAziza's Avatar
Join Date: Mar 2009
Location: Oakland, CA
Posts: 397

Big Orange Work Truck - '83 Ford F-250
90 day: 27.54 mpg (US)

Jessica's - '04 Toyota Matrix
90 day: 41.21 mpg (US)

Ninjette - '01 Kawasaki Ninja EX250R
Thanks: 44
Thanked 68 Times in 45 Posts
I have read several places that you should not disconnect the alternator from the battery (the thick cable) without also disconnecting the field circuit (thin wire to the regulator) because the alternator will continue producing charge and with no where for the charge to go, it will overheat and eventually self-destruct.

Charging System Checks (Alternator Testing) (in bright red) (very bottom of the page)
Self build adjustable alternator controler (about 9/10ths of the way down, begins "important")

I think "If you have an internal regulator then you may have to dissect it a bit and bring out a field lead to a switch." is what you have to do if you have a one wire alternator (internally regulated).

You need to put the lead on a switch, not a button.
I have done this, and mainly charged the battery at home, but you need to watch it very closely. I forgot 2 or 3 times to recharge after a few hours driving (including some night driving) and the thats all it took. Wouldn't hold a full charge anymore. Car batteries aren't really meant to be used for more than a few seconds at a time.
I just put in some RV batteries today. Hopefully I should be able to remove the alternator belt altogether, and avoid even the power loss from the freewheeling alt pulley.

Originally Posted by Piwoslaw View Post
A few months ago I returned home just as my neighbor pulled into his driveway. It was cold (around freezing) with some rain and sleet, and he yells to me: You rode your bike? In this weather?!?

So the other day we both returned home at the same time again, only now the weather is warm, sunny, with no wind. And I yell to him: You took the car? In this weather?!?
  Reply With Quote