alternator fix?
alternator fix? ok people... after burning up my first alternator and possibly the second new one ive given up on wiring this pos the way the diagrams have shown.... i used the single wire to the post with switched 12 volts, burned it up. got a brand new alternator for a 04 lq4 and wired it up with a switched 12 volt bulb/dummy light and a switched straight 12 volt wire to the 2 posts marked L and F. it worked for about 20 miles then it stopped charging and the alternator would "full field" charge for about 2 seconds then stop. then about 20 seconds later i would get a "burst" charge for another 2 seconds.
so here i am pissed off to say the least. i want to know what you think of this idea. i have pics of this adventure if someone will help me post them if not use your imagination or something i guess.... i took a smaller wire and wired it to the field wire inside the alternator, then ran that wire to a old school style external voltage regulator. hooked the regulator up how its supposed to be and tadaa! charging at 14.2 volts at idle and no higher than 14.5 volts with some revs... it sounded normal when charging and the alternator did get hot or show signs of "full fielding". i used this setup when i hacked together a turbocharged neon and it worked like a champ. will it last, im not sure... thats what warranties are for lol
so here i am pissed off to say the least. i want to know what you think of this idea. i have pics of this adventure if someone will help me post them if not use your imagination or something i guess.... i took a smaller wire and wired it to the field wire inside the alternator, then ran that wire to a old school style external voltage regulator. hooked the regulator up how its supposed to be and tadaa! charging at 14.2 volts at idle and no higher than 14.5 volts with some revs... it sounded normal when charging and the alternator did get hot or show signs of "full fielding". i used this setup when i hacked together a turbocharged neon and it worked like a champ. will it last, im not sure... thats what warranties are for lol
Rockstar
iTrader: (15)
Joined: Feb 2009
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From: I'm on a boat! in Shreveport, La
So is this fixed or not? 
The alternator needs a 5v reference signal to turn on, just like all the other sensors. I tapped into the IAT sensor power for mine. 12v will kill the circuits in there quick. I burnt through two like that.
The alternator needs a 5v reference signal to turn on, just like all the other sensors. I tapped into the IAT sensor power for mine. 12v will kill the circuits in there quick. I burnt through two like that.
It seems to work. I think the internal regulator needs the 5 volts to turn the alternator on, im thinkin the way I did it is bypassing the internal regulator and am using my 6 dollar external regulator. It seems to work alright now. Im using my external regulator to excite the charge effect of the alternator. ill report back if the alternator takes a ****. Its workin better than it has before... if anyone knows if this wont work let me know. Ive got warranty on the alternator so im not too worried if this doesnt work since it didnt work before anyways.
