Alternator not charging - Team Camaro Tech
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post #1 of 11 (permalink) Old Nov 30th, 12, 01:03 PM Thread Starter
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Alternator not charging

I have not done any checks just little reading. I am wondering if my alternator will not charge if I don't have gauges or the alt light in the dash connected?

Currently I don't have the gauge pod (factory) in the car. I am going with 5 inch tack and speedo. I just connected up the alt and I am not getting charge at the battery. My thought is maybe I don't have full connection at the dash?

IF the problem is under the dash what wires need to come together to allow it to charge.

Alternator is new, I aslo had NAPA bench test it before buying it just to make sure it was good.

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post #2 of 11 (permalink) Old Nov 30th, 12, 01:18 PM
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Re: Alternator not charging

Just use voltage meter and should be 14 volts while running, if 12 then not charging. The easiest is to remove Positive battery cable while motor is running and should run, if it stalls then Alternator not charging or not hooked up properly.

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post #3 of 11 (permalink) Old Nov 30th, 12, 02:47 PM
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Re: Alternator not charging

I wouldn't disconnect the pos batt cable with the engine running - you could ruin the alt or worse. Best is to use a volt meter and compare running vs non-running voltage as said. A simple test is to start the car and shine the headlights on the back wall of the garage. Shut the engine off and see if you notice the headlights go dimmer. If so, alt is providing more voltage than batt. If no change likely no alt output.


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post #4 of 11 (permalink) Old Nov 30th, 12, 03:15 PM
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Re: Alternator not charging

Joe - If I'm reading your question right, and if your vehicle currently is stock charging system but you do not have a bulb or have a good bulb in the GEN light socket you will not excite the Alternator. The system requires the Voltage Regulator to sense the resistance of the bulb in the socket to send the excite signal to the Alternator.

So add the bulb and it should start charging if everything is up to specs but even with the bulb low RPMs won't charge the battery. Forgot the base line RPMs but search a few threads.


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post #5 of 11 (permalink) Old Nov 30th, 12, 03:23 PM
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Re: Alternator not charging

Quote:
Originally Posted by 69-Pace View Post
Joe - If I'm reading your question right, and if your vehicle currently is stock charging system but you do not have a bulb or have a good bulb in the GEN light socket you will not excite the Alternator.
Isn't there a resistor wire in that circuit somewhere that takes over if the bulb is burned out or missing?


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post #6 of 11 (permalink) Old Nov 30th, 12, 03:31 PM
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Re: Alternator not charging

If I remember right.... the dash light (bulb) for the Alt. is the resistance to the circut that's needed to tell the Alt to charge.

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post #7 of 11 (permalink) Old Nov 30th, 12, 04:33 PM
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Al
 
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Re: Alternator not charging

My wiring diagram for a 69 shows a 12ohm 20 ga. resistor wire parallel to the idiot light circuit, and I assume this is to provide resistance should the bulb burn out.


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post #8 of 11 (permalink) Old Nov 30th, 12, 04:35 PM Thread Starter
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Re: Alternator not charging

Should state that the alternator is internally regulated (sorry guys, sick and suck in the bed at moment and sleepy) This was converted many years ago prior to taking the car apart, it had always worked fine (charged) with no issues. Now seven years later going back together.

Same harness as before, new alternator (but tested to make sure it was good) HEI dist.

Dash gauges are not installed in the car and the factory plug into the gauge housing is not plugged in.

I think it needs the "excite" circuit completed because of no instrumentation being connected at the dash is the reason for it not charging. I think the alt light is part of the circuit board on the factory gauges so would there be two wires to join some place under the dash to complete the "excite" circuit?

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post #9 of 11 (permalink) Old Nov 30th, 12, 06:01 PM Thread Starter
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Re: Alternator not charging

***FIXED***

Well after some thought and the wife left I left the house...I got out of bed (been sick) and went in the garage, I checked the wire from the #2 output connection on the alt to batt connection on the alt and I had no continuity. I pulled the connector and the terminal was broken inside that connects to the alt #2 terminal, it just had no pulled out.

I removed the old terminal, I just happened to have another and slid it right in and it locked into the connector, soldered up a new connector on the end and attached to the batt terminal on the alt. Fired up the car and 14.5 volts at the battery charging!!

The bad news....wife came home from the store just as I was closing the garage door.....busted!! Back in bed for me....

"If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn.......
Then, you have enough horsepower."
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post #10 of 11 (permalink) Old Nov 30th, 12, 06:43 PM
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Re: Alternator not charging

Glad you found the problem, but sucks getting busted...

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post #11 of 11 (permalink) Old Nov 30th, 12, 10:08 PM
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Re: Alternator not charging

Busted? Shouldn't you get the CMA/H?
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Sorry, I see the language was translated. Oops!
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