Battery discharge
Thread Starter
Heel & Toe
Joined: Nov 2020
Posts: 17
Likes: 0
Battery discharge
Hello Everyone,
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
Pro
Joined: Jan 2016
Posts: 524
Likes: 126
From: Sandown NH
Fully charge you battery and unplug your seats. If they battery doesn't die you found the problem. The power seats are a common cause for dead batteries in a C5. If the seats aren't the problem you need to do a draw test and see what circuit is causing the draw.
Race Director
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
Hello Everyone,
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
Melting Slicks
Joined: Sep 2008
Posts: 3,127
Likes: 799
From: Espanola New Mexico
Headlight clicking and gauges flickering is probably due to the battery being discharged, power seat switches are a common cause of battery drain problems, fix that and your battery discharging problem should clear up.
Race Director
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
Hello Everyone,
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
I just bought a 2000 C5 Corvette convertible and the battery keeps losing it’s change. The ampmeter shows the alternates is putting out 13.5 amps.
Even with the car shut off, I hear a noise that sounds like the noise from moving the seat back or forth, only not as loud. It continues to happen for quite awhile after the car is shut off. I think that might be draining the battery.
Also, the headlight motor on the passenger side clicks and gauge lights flicker when I hook up a battery charger to the battery.
Any help you can give me I will greatly appreciated.
Thanks,
Nick
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
.
Joined: Apr 2013
Posts: 5,023
Likes: 1,150
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Race Director
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
If your BCM (body control module) doesn't shut everything down in proper sequence while its preparing to go to sleep, it can drain a battery overnight! I had this problem on my 2000 C5 Vert. I had a battery, 3 months old MAX, go dead in about 12 hours. Charged it fully, then foolishly waited for it to happen the very next morning. It did. So I got advice on this forum, pulled the BCM, took it to a local "Corvette repair shop", and they sent it in for repairs.......for $500!! WAY to pricey, I should've shipped around. But they did fix whatever was wrong. About 5 or 6 years later, same problem. So I paid close to $1,000 for one of the last new old stock BCMs available. Came right from Delco store in Detroit, Michigan area. That was 2014, and no problems since. When you send in a bad BCM, the repair shops fix only what is wrong, they do NOT "restore" the BCM with all new electronics. Hope this helps.......
Melting Slicks
Joined: Sep 2008
Posts: 3,127
Likes: 799
From: Espanola New Mexico
Before you spend money on a replacement BCM, I would ask that you spend some time on eliminating all other causes of your battery discharging. Yes BCM's do cause battery drain problems, but in most cases it's usually something else like your power seats. all I am saying is take some more time to pin point the problem before firing the parts cannon.
