C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Electrical Issues or just bad battery?

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Old Jan 5, 2013 | 03:39 PM
  #21  
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Originally Posted by theadmiral94
Your welcome.

BTW, running the car at 11vDC will quickly destroy your new battery (note my earlier post -- 12 vDC implies a near dead battery). So, be VERY careful driving the car as is -- and DO NOT turn on any electrical devices (including the heat & radio) until repaired. Low voltage will damage electrical motors (coolant fans, heater fan, seat motors, antenna motor) and may damage electronics (e.g. dash, CCM, alarm, ECM).

FYI, Volt meters (aka VOM) are inexpensive ($20-$50, better ones have 'high impedence' to reduce damage chances to sensitive electronics), they are very easy to use, and a great way to diagnose simple problems and save lots of dough -- no garage should be without one -- next time your at Wally, Radio Shack or a car parts place, pick up a Fluke or similiar brand, worth their weight in gold...
I agree, I bought a multi-meter about a month ago for $15 by craftsman and have used it countless times that I never thought I would have.
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Old Jan 5, 2013 | 03:42 PM
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Would the alternator keep charging the battery if its faulty though? The new battery, even after running with everything for an hour still read like around 11 volts.

But I'll definitely do what you are suggesting. Thanks. So much for a new alternator being put it by the previous owner. Have the receipt for it and the installation but this is kind of bugging me.

Anyway, thanks again for everyone's input!
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Old Jan 5, 2013 | 03:50 PM
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Running it will kill the battery and other things quickly? Got it! Won't run it until I get the alternator checked and see what's going on.

What a pisser, but thankfully it's not my primary vehicle
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Old Jan 6, 2013 | 07:19 AM
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Why did you buy a battery? Nothing pointed to the battery.
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Old Jan 6, 2013 | 07:35 AM
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The old battery wasn't holding a charge anyway. I went out yesterday morning to start the car it was totally dead. Brought it somewhere to check it and it wasn't holding a charge. So it's been a two fold issue until I bought a new one. This one's holding a continuous charge but it's not where it should be.
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Old Jan 6, 2013 | 01:20 PM
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Continuing ...

Checked all connections. including terminals. All look clean and wires look good at connections. No cuts in wires along casing.

Looked through my receipt book and found the previous owner's purchase and installation of a USA Industries remanufactured alternator 7803-11 from June of 2007. Both previous battery and alternator were installed at that time. The guy had the car sitting around for about 3 years before selling it to me. Can an alternator become a problem if it's connected and never used for that time? I'm going to be removing the alternator probably Tuesday and getting it checked but figured I'd ask so I can be prepared to spend some cash should it be bad.

Once again everyone, thank you for all the advice!
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Old Jan 6, 2013 | 01:34 PM
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Originally Posted by 88Woody
Continuing ...

Checked all connections. including terminals. All look clean and wires look good at connections. No cuts in wires along casing.

Looked through my receipt book and found the previous owner's purchase and installation of a USA Industries remanufactured alternator 7803-11 from June of 2007. Both previous battery and alternator were installed at that time. The guy had the car sitting around for about 3 years before selling it to me. Can an alternator become a problem if it's connected and never used for that time? I'm going to be removing the alternator probably Tuesday and getting it checked but figured I'd ask so I can be prepared to spend some cash should it be bad.

Once again everyone, thank you for all the advice!
I have never had luck with re-manufactured alternators on my other cars they always died quickly with 2 years.

Since yours is re-manufactured and sat up for 3 years it could be slowly dying and not being able to provide but the 11V of charge and that is all. I would definitely get it tested but I think your looking at a new alternator.

Good luck, Stephen
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Old Jan 6, 2013 | 02:16 PM
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Thanks Stephen. It wouldn't be the first issue for this car that came from it sitting around, if that's the case.
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Old Jan 6, 2013 | 02:21 PM
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Originally Posted by 88Woody
Thanks Stephen. It wouldn't be the first issue for this car that came from it sitting around, if that's the case.
Thats pretty good if that is all, how long h\did it sit up doing nothing?

Mine sat up for 3 years never started or even opened outside in the middle of a field with no cover or anything.

Mechanically it still has a few problems I am diagnosing with the help of people on here and trying to fix. Only real problems with mine so far is the heater core had a small leak and the radiator cracked where the transmission cooling line went into. Fixed those pretty cheaply and easily. Now dealing with a possibly clogged cat or bad TPS sensor still trying to figure it out.
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Old Jan 6, 2013 | 03:13 PM
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Sat for pretty much the same amount of time. He claimed he started it twice a month and drove it around his parking lot, but a big tranny leak, bad torque converter, and gummed up brake lines kind of told me another story. But the engine had only 77k miles and he was the second owner. Price was right so I took it. It runs great and the interior isn't bad except for cracks/ small tears in the seats.
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Old Jan 6, 2013 | 04:01 PM
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Originally Posted by 88Woody
Sat for pretty much the same amount of time. He claimed he started it twice a month and drove it around his parking lot, but a big tranny leak, bad torque converter, and gummed up brake lines kind of told me another story. But the engine had only 77k miles and he was the second owner. Price was right so I took it. It runs great and the interior isn't bad except for cracks/ small tears in the seats.
Yeah, I got mine for $2000 because the guy thought it did not and would not run (He didn't know that much about cars) All it had was bad gas a dead battery beyond charging and a bad fuel pump. Also still has very faded paint.

I drained and check the tank no rust or any leaks and filled it up. Bought a battery from a friend who never needed it for $75 brand new just sat for about 2 months of no use. and replaced the fuel pump and filter for about $120 and it started right up with no problem and ran perfectly fine.

I have since replaced some things like rotted vacuum lines and as I said radiator and heater core.

I replaced all the interior that was needed. Carpet and seats were replaced and console lid. All plastic was mostly fine I just re-dyed them to black. All it needs is painted which I will have done by a close friends who is only going to charge for supplies..

I think that I came out pretty good at the end and it sounds like you have also.
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Old Jan 6, 2013 | 04:30 PM
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I vote replace alternator.
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Old Jan 7, 2013 | 04:50 PM
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Originally Posted by Glenno
I vote replace alternator.


Yep, bad alternator. Bought a new one, not remanufatured. Lifetime warranty, too. I was very happy it was so easy to remove.

Thanks again, everyone!
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Old Jan 7, 2013 | 05:06 PM
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Originally Posted by 88Woody


Yep, bad alternator. Bought a new one, not remanufatured. Lifetime warranty, too. I was very happy it was so easy to remove.

Thanks again, everyone!
Good, I always buy new alternators because I had bad luck a couple of times with re-manufactured ones. Also has a lifetime warranty which is great also. Since you said it was easy to remove I am gonna guess you probably have it installed also, if so how is it doing now, working properly?
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Old Jan 8, 2013 | 09:35 AM
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Had to be brought into the store near me from another store. In there today so I'll be installing this afternoon. I'll definitely post here how it goes.
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Old Jan 8, 2013 | 03:24 PM
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Originally Posted by 88Woody
Had to be brought into the store near me from another store. In there today so I'll be installing this afternoon. I'll definitely post here how it goes.
You should take some pictures or video it and make a "How To" for other users on the form to use when they need to replace their alternator. Would make a great addition for the newer C4 owners or ones that don't know how to change the alternator yet.
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Old Jan 9, 2013 | 10:08 AM
  #37  
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Originally Posted by Veryevilkitten2
You should take some pictures or video it and make a "How To" for other users on the form to use when they need to replace their alternator. Would make a great addition for the newer C4 owners or ones that don't know how to change the alternator yet.
That would have been a cool idea, but I was finished with it before I saw this post. Pretty easy job, though. I don't have a ton of experience with cars but I've changed a part or two in my time and this was on the easy side. Really helped that the hood goes straight up and gives you all that room. An extra set of hands helped holding done the tensioner so you can get the belt around the alternator.

And, once again, thank you all for your help and advice! Very much appreciated!
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