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Battery not charging

Now this is annoying. I get my starter working fine now my battery wont charge. I drive down to the gas station and I watch my gauges and the volts just keep dropping. So I turned around and drove as fast as i could back home before my car died. What the hell can it be now?? My alt belt is fine. It should only have like 1/2 inch of deflection when pushing down on the top, right? What in hell could this be? Everything was working perfect before I took out the starter.

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Old 11-18-2003, 05:06 PM
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The starter is involved in battery charging. Let me rack my brain (check the archives, I mean), and see if I can come up with the answer.

Someone else probably remembers this, cuz it seems we just went thru this with someone here.
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Old 11-18-2003, 05:08 PM
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Yeah, the starter is in the circuit so I could have an open circuit eh? Could the circuit be shorting internally in the starter? I guess Im going to have to clean off all the wires I touched.

On a lighter note, no more clankity clank from my starter. Starts perfect everytime now.
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Last edited by TheCooler; 11-18-2003 at 05:36 PM..
Old 11-18-2003, 05:33 PM
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Is the low volts light on with the key on, but not running? Does the light go out once it is running?
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Old 11-18-2003, 05:49 PM
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When the key is on the light does not come on and when the car is running the light isnt on. I noticed when I turn the key to on the volts seem almost normal but when I start the car the volts drop under 10.
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Old 11-18-2003, 05:55 PM
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I seem to remember that the light being on with key on and engine not running is important in some of these systems. I have a 911 also and sometimes get the wires crossed (sorry, bad pun) but I think this is a 944 issue too.
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Old 11-18-2003, 06:08 PM
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Well I guess the light comes on when the alt is putting out too much power when the car is running or the battery isnt charging enough. Its a 12v light so if the alt is at 14 and the battery is only holding 4 the light will be very bright because 14-4=10 so it will have 10 volts going to light. Ill have to get the voltmeter out tomorrow and see whats up with this.

Anyone know why the light doesnt come on when the key is in the on position?
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Old 11-18-2003, 06:26 PM
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My guess would be you forgot to attach something or incorrectly attached something when you were doing the starter work. Otherwise, maybe your voltage regulator? Don't know how to trouble shoot one though.
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Old 11-18-2003, 06:38 PM
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Just get the car running and measure the voltage at the battery: for a series 2 car, you shopuld be reading at least 13.7 volts at the battery with the engine running.

AFJuvat
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Old 11-18-2003, 06:41 PM
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Ill go check now cuz im bored ... battery was at 12 when i started her but it started dropping quickly so says the voltmeter.
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Old 11-18-2003, 07:04 PM
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Voltage at the battery. Not the voltage in the dash.

Get a cheap digital volt and ohm meter. Check the voltage accross the terminals at the battery.
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Old 11-18-2003, 09:23 PM
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I did and thats my results.
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Old 11-19-2003, 12:04 AM
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Ok well I cleaned everything and im amazed to find my car runs a little smoother now ..weird. But anyways I think it may be my battery going bad seeing as battery fluid is leaking a little. I left my car running with the lights on right now to see what happens. I took it for a 5 min drive while staying in 2nd gear with about 4k RPM to see if it will charge...it doesnt go past 12 now. Voltmeter reads a little less than 12 at battery. If it stays there im guessing new battery?
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Old 11-19-2003, 01:54 PM
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DAMNIT, i went back downstairs and the voltmeter read about 9 at the battery. I cleaned everything, what could be happening? Is it possible for a short inside the starter to do this? I cant think of anything else.
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Old 11-19-2003, 01:58 PM
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check the bulb/s
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Old 11-19-2003, 03:47 PM
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Check the bulbs?? What would that have to do with the problem. The only reason I turned on the lights was drain the battery faster to see if it would actually charge.

I charged my battery with a battery charger and it holds a charge fine. Its not the battery or external connections from what I can see

Im still looking for the reason why the alt light isnt coming on. It used to come on before.
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Old 11-19-2003, 04:02 PM
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the bulb that lites up the alt lite may be burned out and it's part of the circuit.
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Old 11-19-2003, 04:11 PM
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......sheesh. Youre telling my porsche made it so the battery wont charge when the light in the dash is out ...sad. What kinda of bulb is it?
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Old 11-19-2003, 04:51 PM
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xmas lites in series, one is out and the whole string is out and the batt isn't recharged by the alternator.

bosch did it to volvos also, i had the same problem years ago and a week ago put up a post about the xmas lites on my p-car.

when the alt failed i didn't see anything but lites getting dim until the car quit running, lites, fuel pump because the bulb had gone to a better place in the electron world.

one of the tech articles at pp spells this all out.

i charged it on a slow charge for two hours, until the auto function shut the charger off.

the car running showed 12.7/batt and by the time i got home 12.3.
i pulled the cluster out, put in a bulb from the parking brake that did lite up with the key on and when the car started it showed 13.7 volts/batt.

i now don't have the parking brake lite but i've got a few bulbs coming.

the alt lite should be on with the key on, go off when the engine starts and when you turn the key off, you should see the alt lite come on.

good luck.
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Old 11-19-2003, 09:33 PM
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Youre the man, I LOVE YOU...in a purely porsche loving way.

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Old 11-20-2003, 11:37 AM
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