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Thread: Low Voltage, Why?
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08-20-2010, 08:19 PM #1
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- 2000 Camaro B4C
Low Voltage, Why?
So for the last week my voltage gauge has been reading low, under the 9 for the voltage gauge in the car. Tonight while I was out driving my lights got really dim (interior and headlights ect) i turned off as many accessories that i could and then my Service Vehicle and Air Bag lights came on. What would cause these issues, bad alternator? battery?
2000 B4C Special Service Package Z28 - Kooks 1&7/8 Stepped 2'' - TSP Torquer V.2 - FAST 92/92 - BDR 4000 Conveter - Xtreme Trans Stage II - Full UMI Suspension - Pacesetter LT's - Comp Drag Shocks - Magnaflow - Cutout - ZO6 MAF - FTP LID - Street Tuned -
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08-21-2010, 02:50 AM #2
First step is to take off the battery connections, clean them well, check the wiring to the alternator. If you have a charger and voltmeter, charge the battery up and test the voltage.
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08-21-2010, 04:37 AM #3
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
Sounds like a classic alternator failure. Like ^^^DaddySS said, do a couple quick check of the battery and alternator connections. makes sure they are clean and tight. But I'd bet your alternator went bad.
Also check to see if your power steering is leaking onto your alternator. They have been more than a few people on here with that problem causing an alternator failure. Unfortunately you may have 2 problems to fix
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08-21-2010, 04:37 AM #4
OH that should be an easy fix!
Pop the hood.
Locate alternator
Verify there is a red wire going into the alternator.
It should be in a clip on the top part of the alternator.
That wire tells the alternator to turn on. It easily gets broken
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08-21-2010, 04:59 PM #5
Do U have 13.5 volts on cold start up...then it drops when U start turning shit on Like A/C...U have a weak Alt..I just went through this..Replaced Alt..works good..
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08-21-2010, 05:52 PM #6
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Phantom Black Metallic- 2004 GTO M6
You could also have a bad bearing in the alternator causing the low voltage. Gotta love seizing alternators.
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08-21-2010, 08:33 PM #7
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been at work for the last 15hrs so ill be working on the car monday morning, my mechanic also thinks its the alt
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08-22-2010, 06:31 PM #8
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08-23-2010, 10:44 AM #9
^^This.
I just had a situation in which I thought my alternator crapped out. Took it off the car to replace it & found that the plug had broken off from the wire flush with the connector. Took the alternator in to get checked just for piece of mine & it was fine. Grabbed a plug from salvage with a few inches of wire on it & spliced it in. Everything is fine now & only cost me $10 although if you call the dealer they wanna slap you for $46 for this plug.
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08-24-2010, 02:39 AM #10
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08-25-2010, 11:14 AM #11
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08-29-2010, 12:08 AM #12
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Black- 1998 Trans Am
Probably Alternator like everyone else is saying. The Zone will check it for you for free once it's off the car.
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08-30-2010, 07:54 PM #13
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New Battery in today, car starts and runs like normal. the voltage gauge reads right around 11, is this a prob?
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08-30-2010, 08:07 PM #14
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08-30-2010, 08:15 PM #15
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what are the chances that both go bad at the same time, the battery wouldnt hold a charge and now the voltage reads low
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08-30-2010, 08:20 PM #16
You alternator probably took a shit or is on its way out, causing your old battery to not keep a charge.
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08-30-2010, 08:32 PM #17
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08-30-2010, 08:50 PM #18
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looks like i jumped the gun on buying the battery first...can i return a battery? Never had to take on back before...if the alt is the culprit
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08-31-2010, 11:53 AM #19
I'd keep the new battery since you already bought it. Grab a alternator & return your old one for the core. But make sure whatever you do you check that plug on the alternator. Cause if its frayed or tryin to break off it wont allow the alternator to charge the battery properly & you'll still have low voltage issues even with a new alternator & battery.
That stupid thing caused me a major headache on my car.
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08-31-2010, 04:40 PM #20
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