Battery Drain
Thread Starter
1st Gear
Joined: Oct 2024
Posts: 1
Likes: 0
From: Mount Dora, FL
Battery Drain
My C5 has killed 3 batteries in the last 10 months.
I am at a loss to find the cause of the parasitic drain.
I want to find a mechanic who is proficient in diagnosing and repair of C5 electrical issues.
I'd appreciate any recommendations in the Apopka, FL or Mount Dora, FL areas.
I am at a loss to find the cause of the parasitic drain.
I want to find a mechanic who is proficient in diagnosing and repair of C5 electrical issues.
I'd appreciate any recommendations in the Apopka, FL or Mount Dora, FL areas.
Race Director
Joined: Oct 2008
Posts: 16,670
Likes: 7,738
From: NJ
My C5 has killed 3 batteries in the last 10 months.
I am at a loss to find the cause of the parasitic drain.
I want to find a mechanic who is proficient in diagnosing and repair of C5 electrical issues.
I'd appreciate any recommendations in the Apopka, FL or Mount Dora, FL areas.
I am at a loss to find the cause of the parasitic drain.
I want to find a mechanic who is proficient in diagnosing and repair of C5 electrical issues.
I'd appreciate any recommendations in the Apopka, FL or Mount Dora, FL areas.
Once you get to the right circuit you can disconnect plugs and narrow it down further.
Melting Slicks
Joined: Sep 2004
Posts: 2,847
Likes: 439
From: Spring Texas
As suggested, you'll need an amperes meter connected in series with your negative terminal and the car. Get that set and start removing and inserting each fuse until you find the one with the big drop. You'll never get to zero, expect some kind of draw always.
Number of cars I've worked on... most common was a bad aftermarket radio interface or instrument cluster.
time consuming. But not really difficult.
this is not corvette specific, but a good write up of the common procedures...
https://ricksfreeautorepairadvice.com/how-to-perform-a-parasitic-battery-drain-test/
many YouTube videos for corvette are also available.
Number of cars I've worked on... most common was a bad aftermarket radio interface or instrument cluster.
time consuming. But not really difficult.
this is not corvette specific, but a good write up of the common procedures...
https://ricksfreeautorepairadvice.com/how-to-perform-a-parasitic-battery-drain-test/
many YouTube videos for corvette are also available.
Last edited by VinceC5; Jun 30, 2025 at 05:25 PM.
Melting Slicks
Joined: Oct 2006
Posts: 2,193
Likes: 156
From: Navarre FL
How much does it sit between driving it? I recommend getting a battery tender for starters. As mentioned, bad stereo install is a common culprit, but these cars are known for staining batteries if they sit for 3 weeks or so.
BTW I'm in Mount Dora area myself.
edit to add that I've used corvette masters in Maitland. Good, honest guys.
BTW I'm in Mount Dora area myself.
edit to add that I've used corvette masters in Maitland. Good, honest guys.
Heel & Toe
Joined: Apr 2021
Posts: 16
Likes: 1
Battery Drain
I had similar issues. I did as others have done, get a multi meter with long leads or have another set of hands to watch meter as you go from fuse to fuse. Mine was shorted with the air bag in the drivers seat.
CF Community Team
Joined: Oct 2004
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From: Cape Cod, Mass.
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