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2005 corvette electronics dead .

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Old Aug 8, 2020 | 03:44 PM
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Default 2005 corvette electronics dead .

2005 Corvette electronics not working car is dead with the exception s of headlights gas filling door works, with button on car dash .I was able to get into car with the emergency entrance procedure.
Nothing else works does not start no cluster no radio the interior lights work I cant even close the doors all the way because I think it need`s power to activate the mechanism car battery is good full charge connections are good fob batteries are good any ideas would be appreciated....
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Old Aug 8, 2020 | 04:51 PM
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How did you check the battery? Did you do a load test on it?

Your symptoms sure sounds like a battery with a bad cell, charger shows full voltage charge but it lacks amperage.

Good Luck
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Old Aug 8, 2020 | 05:01 PM
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Yup .... A bad battery might show 12 volts when you put a voltmeter on it, but has no cranking amps at all.
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Old Aug 8, 2020 | 05:35 PM
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I will do a load test on it soon but you would think it would let me in the car even if the battery was low thanks you for your help .
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Old Aug 9, 2020 | 06:00 AM
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Sure sounds like a battery issue to me
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Old Aug 9, 2020 | 03:42 PM
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These cars are like alcoholics in need of a drink, or they get the DTs! Weak battery, and there's no logic to what will or won't work!
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Old Aug 9, 2020 | 04:11 PM
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New battery and then a battery tender. First thing I purchased was a battery tender when I bought my C6. Lots of research around these parts convinced me it was the way to go.

Last edited by Chuckham; Aug 9, 2020 at 04:11 PM.
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Old Aug 9, 2020 | 04:11 PM
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Thanks I`m buying load tester Monday I hope that`s all it is last year it tool me 5 month`s of working on and off the car to solve my instrument cluster problem ...
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Old Aug 9, 2020 | 04:13 PM
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Thanks i will do that as well once I get it working ....
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Old Aug 9, 2020 | 05:00 PM
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Exactly how old is the battery in your 2005 Corvette ?

Or, did you just purchase the car not long ago and don't have any idea as to how old the battery is ?
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Old Aug 9, 2020 | 05:08 PM
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Originally Posted by 72454

Thanks I`m buying load tester Monday I hope that`s all it is last year it tool me 5 month`s of working on and off the car to solve my instrument cluster problem ...
Save the money it costs to buy a battery load tester. Just remove the battery and take it to Autozone or Advance Auto ... They will load test it for free.
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Old Aug 9, 2020 | 05:55 PM
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Originally Posted by Turbo6TA
Save the money it costs to buy a battery load tester. Just remove the battery and take it to Autozone or Advance Auto ... They will load test it for free.
. The money you save from not buying a load tester, use towards a good battery maintainer such as a Deltran Battery Tender Plus.

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Old Aug 9, 2020 | 07:46 PM
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Just looked 2 -1/2 years old. I borrowed a neighbour`s load tester with a full charge it stayed in the green for 14 to 15 seconds also cleaned all the terminals good ,car still dead .....If I hook up a second battery on jumper cables would that make any would that tell me any thing ...
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Old Aug 9, 2020 | 08:02 PM
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If you jump the battery with a known good battery, it should start as long as you have a good set of jumper cables.

After you get it started, you need to put a battery charger on it till it's fully charged ... If it won't hold a charge, replace your battery.
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Old Aug 10, 2020 | 09:37 PM
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2 good battery`s hooked up all connections clean good cables same nothing I know from working on this car it wasn`t going to be easy took the battery back out cleaned all connection beside and below battery tray hooked power from jumper cables with battery out moved and wiggled 4 plugs around on ECM I had them off last year for instrument cluster job a year ago so i think there clean . I will be looking at fuse box under the hood tomorrow with battery hooked up there is about 5 fuses that show no power I don`t know if there switched or not but the rest are all hot ? I will be taking the hole thing apart seems to me when they had that recall for the headlight they had to open this up and jump some bad connections ... .
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Old Aug 12, 2020 | 12:47 PM
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At this point might as well get it in the air to check starter & solenoid.
Starter/solenoid go bad due to heat (like AZ) aggravated w/ headers, especially check connections to solenoid.
Solenoid posts are held by a bakelite material which cracks, can result in an open circuit.
USUALLY when this happens there's a complete loss of power; however, there may be variations like yours.

Have starter/solenoid connection thoroughly checked to confirm integrity of solenoid housing.
IF a DIY be damned sure to disconnect battery first, accidentally dead shorting brings great headaches.

G/L, please update w/ solution...or not.
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Old Aug 12, 2020 | 11:04 PM
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Todays efforts inspected starter looks okay Ran another vehicle beside it, with it running 14 volts going to car with a good battery in the car
that rules out any doubt about bad battery inspected the fuse box under the hood nothing out of the ordinary nothing burnt changed relays around
same .Back to basics something not turning on in the car I'm not sure what the chain of command is for fob detection then signal to activate relay
for BCM or ECM something not getting turned possibly faulty computer which one is activated first I`m giving some thought on manually activating
the power train relay I will sleep on it ....cheers
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Old Aug 12, 2020 | 11:51 PM
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Check the main connectors to the fuse box under the floor board, I've seen where there can be issues with these from passengers pushing down to hard in this area with their feet. See attachment.

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Last edited by madsonp; Aug 12, 2020 at 11:52 PM.
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Old Aug 13, 2020 | 01:55 AM
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Already done that with contact cleaner thanks ..
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Old Aug 17, 2020 | 02:01 PM
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Originally Posted by 72454
Already done that with contact cleaner thanks ..
I made a fusible test lead with a prob with half a fuse on the end end so I can remove the fuse from the panel and supply power remotely I did this on my Blazer with the ignition off and was
able to raise and lower the window I`m going to try this on the C6 on my window fuse so I can lower the window and close the door If it dont work them Im sure I have a grounding problem
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