Battery draw issue

[NewAge1970]

Okay, so I have a battery draw issue and cannot find a wiring diagram on it. The engine has a ground strap to the firewall. The alternator is a two wire. The ground from the alternator goes to the radiator support. The voltage regulator and the alternator has been replaced. Along with the battery. The alternator when it is plugged in, draws on the battery bad. Kills it in an hour. Help! It's got a nasty motor in it, but with A draw, it is useless! Message if you have questions. I will answer
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[trkfrk]

Remove the + battery cable. Place a test light between the loose battery cable and the + battery terminal. The test light should light up. Start unplugging your connections one by one until the light goes out. Once the light goes out, you have found the circuit that is drawing down the battery.

[Longhorn Man]

If you were to look on the electrical forum in the FAQ thread in there you'll find a set of color coded schematics.
It sounds to me like a bad alt.
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[NewAge1970]

i think it is my ignition switch, there are two alternator wires, the field and the stator wire. the stator wire is hot all of the time. i believe that they are both supposed to be dead, and then one goes hot when the ignition switch is turned on, then the other is hot when the alternator charges. am i correct? if this is the case then the ignition switch is keeping one of the wires hot all of the time and therefore drawing battery power at an extremely high rate.

[MARKDTN]

Do you have an original alternator and separate voltage regulator or has it been upgraded to an internal regulator alternator? Sounds like a bad alternator to me.

[NewAge1970]

it hasnt been upgraded, but i have replaced the voltage regulator and the alternator more than once, and the issue has still persisted. ive replaced the battery as well.

[LockDoc]

Originally Posted by NewAge1970

it hasnt been upgraded, but i have replaced the voltage regulator and the alternator more than once, and the issue has still persisted. ive replaced the battery as well.

If you want to try another ignition switch PM me your address and I will send you one that is tested and works.

LockDoc

[domeier]

Originally Posted by NewAge1970

...the stator wire is hot all of the time. i believe that they are both supposed to be dead, and then one goes hot when the ignition switch is turned on, then the other is hot when the alternator charges.

The stator should be hot at all times, but not grounded. You need to disconnect your + battery lead and hook up a test light in series. Then you can start disconnecting wires with the key off. When the light goes out, you've found the circuit that's grounded.

[NewAge1970]

I've got an ignition switch on order, I have to put a new flex plate in as well because somehow mine is egg shaped and keeps breaking starters. But this draw issue is killing me. I have a motor with 2.02 aluminum heads, all internally balanced and I can't drive it.
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[NewAge1970]

i hooked a volt meter up to the stator and field wires on the alternator. i believe it is the stator wire, i dont remember for sure, is the wire with voltage to it. the alternator is a two wire with an external regulator.

[VetteVet]

You should have two wires on the plug to the alternator, a white one F and a blue one S. The blue one and the large red one on the back of the alternator are hot all the time and the white one is hot with the key on.




This is the engine bay wiring.

[NewAge1970]

Well, I have no idea where the draw would be, I know that if I un plug my alternator, my draw goes away.
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[67swb72klb]

Ding ding ding !!!

[NewAge1970]

Yeah, how do you fix it genius
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[67swb72klb]

i would check the alt first and go from there

[NewAge1970]

Alt and regulator has been replaced twice.
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[NewAge1970]

And it still has the same issue
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[VetteVet]

Have you tried just unplugging the regulator and are you doing this with the key on or off.
I would check for a short to ground on the regulator wires esp the white and blue ones.

Disconnect the large red wire on the alternator and unplug it then check for continuity on the plug terminals and the large terminal. Reverse the leads and recheck to see if you get continuity both ways. I had a blown diode in one of my field diodes and it drove me crazy until I realized a diode was bad. I know that you have replaced the alternators twice and the regulators twice, but what you're are saying really points to a bad alternator.

By this time I would have bought the 12 SI internal regulated alternator and done the conversion and never looked back. If you have a short to ground or a bad draw then it's best to find it first. VV

[NewAge1970]

Reverse the leads on the plug in?
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[NewAge1970]

And I checked the wire voltages on the plug In with a voltage regulator. With key on and off. One of the wires, i dont remember which one was hot
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[crushermechanic]

you reverse the leads on you volt meter. a diode acts like a check valve for electricty. current should only flow one way. when you reverse the leads yo check to see if the diodes are working correctly. were you alternators remans? i have had several bad right out of the box.

[VetteVet]

If you have the white and blue wires reversed in the alternator plug it will also cause a battery drain.

Does yours look like this one?

[PAWS 72]

if coming from auto zone,oreillys or advanced auto have them to check them before you leave the store.they have found three in a row one time for me.always napa or car quest from now own for me. unless oil or air filters or accessories.

[crazy longhorn]

I ran into the same trouble on my longhorn. I am pretty damn sure its in the diode bridge in the alt....the damn thing charges fine, & runs 2 elect fans! If she sits for a day or 2, no start! With too many other "broken" things to play with, here is what I did.....a shutoff switch on the neg side of the battery , & that has 'crutched' the problem for the last yr! I will bet its in the alternator, or the wiring to it crazyL

[domeier]

You said you have a two-wire alternator, but it's hooked up to an external regulator? Are you sure it's not internally regulated? Not sure if that would cause your draw... but here's a diagram anyway: Good luck.