Brian2006

iTrader: (42)

Damn it to hell... Been havin this low voltage problem for a little while now. The car reads normal voltage but once it warms up it pretty much is running off the battery and hovers in the 12.0-13.0 volt range. Drive it even longer and it'll dip into the 11's. Figured it'd be the altenator right? Wrong

Changed the altenator tonight and its doin the same thing. Assuming the voltage regulator is built into the new altenator, I'm guessing this is not the problem. What gives?

pentavolvo

could be a bad ground or a crap connection somewhere... do you have a voltmeter. i would start by measuring voltage at the alternator

Brian2006

iTrader: (42)

Yeah I'm gonna do that after work. measure it under load I presume? I doubt it's the altenator anyways, the thing is new and maybe has 1 minute of ideling on it

Dimitri-

iTrader: (10)

I had sorta the same problem as you but I argued against refurb'd pos alts and got a new new one, are you sure its a brand new one?

FILAMENTWS6

iTrader: (2)

I had the same problem a few months ago. I replaced the original, and the replacement was bad. Had to do it twice before I got one that would work. Both of them were AC Delco. So it's possible you did get a bad one.

WS SIKZ

iTrader: (3)

rebuilt are actelly better , they are rebilt in usa and new are from where? china or taiwan think aboutt that

and i tried 3 different brrands from delco autto zone and this place by my shop

i blew ouot 6 of them in 2 weeks.
the problem? nott enough amps

auutozone amps for our car 00 5.7-102 amps ****
delco is like 135 i think
i ordered my 200 amp alterrnator today for like 299
this shouold do it and checck everything after i went WOT they blow

Brian2006

iTrader: (42)

Pretty sure the problem is NOT the altenator. I just had the old one tested and it passed everything

The Guz

iTrader: (8)

Have you had your battery tested? Also see if your battery cables are clean.

x2jesse1x

iTrader: (4)

Is the new alt a HO alt? If so did you do the big 3 uograde?

Brian2006

iTrader: (42)

Battery was tested and was said to be fine. However I'm considering throwing the battery from my truck in there just to verify.

Altenator is a remanufactured 102amp factory replacement. But like I said, the old altenator was said to be just fine. Big 3 upgrade is probably my next option in case I have resistance in the ground connections and/or altenator power wire. Is it necessary to upgrade to 0awg on the altenator? I have stinger 4awg layin around here

Dimitri-

iTrader: (10)

I wish I knew what the big 3 was and how to do it :\

Brian2006

iTrader: (42)

I think someone did a write up in here so just search "big 3"

ls1mongrel

iTrader: (32)

Big 3 is chaging your battery/alternator/grounds wires to bigger wire, I recent did this with a 200a alt and I run steady at 14+ volts. There is a kit available pm for info as they are a non sponser.

mike moore

iTrader: (19)

A local guy had a similar problem, and it ended up being a bad connection inside the plug that goes into the alternator. He found it by wiggling the pigtail, it wouldn't charge well at all if he didn't touch it, but as soon as he lifted up on it, it went to full voltage. Might not be your problem, but it's free and worth a shot.

Jon5212

iTrader: (2)

I'm leaning towards a bad ground/ loose connection somewhere on the plug to the alternator. My car still has a factory alternator and I am at 13.4 - 13.8 volts at idle.

pentavolvo

4ga is fine for big3

blackbyrd

iTrader: (14)

brian does your battery light work?? it uses the the 194 bulb as a fuse oddly enough and the resistance on that bulb is what actually excites the alternator if im not mistaken, there is one only one wire on the alt plug if im not mistaken, but there are 4 pins on the connector one requires the bulb and one is a self protected one so you wont blow the alt. depends on what vehicle is how gm did that i think. anyway doesnt sound like a bad alt sounds like its loosing its signal that tells it to charge.

i know most of this becasue of the v6 swap i did and the pan in the *** i had trying to get mine to charge i ended up wiring it to switched ignition through the protected circuit on the alt. i might give that a shot

Brian2006

iTrader: (42)

The battery light? Which battery light? The one in the cluster???

blackbyrd

iTrader: (14)

yeah as creazy as it sounds the one in the cluster

Brian2006

iTrader: (42)

ummm still confused which one. The actual bulb? All my bulbs in my cluster work. 5 of them are LEDs in fact. And I'm gonna assume you're talking about the voltmeter light which in fact does work (and is an LED)