"Battery Protection Package" problem
Thread Starter
Advanced
Joined: Jul 2012
Posts: 53
Likes: 11
From: Point Clear, Alabama
"Battery Protection Package" problem
I keep this device on all the time when the car is not being driven. Has worked fine for 2 years,
Today I noticed that on the charger face only ONE green light is lit, the one under the picture of the Corvette.
NONE of the other lights are on. These are the ones under the battery charge level indicators, usually showing as either green or yellow.
I've unplugged, re-plugged, tried every way to get it back to its usual state of 2 lights on. No luck.
Yet the car is apparently fully charged as usual.
Could this simply be a failed indicator light on the face of the charger/maintainer?
Anybody else run into this?
Thanks.
Today I noticed that on the charger face only ONE green light is lit, the one under the picture of the Corvette.
NONE of the other lights are on. These are the ones under the battery charge level indicators, usually showing as either green or yellow.
I've unplugged, re-plugged, tried every way to get it back to its usual state of 2 lights on. No luck.
Yet the car is apparently fully charged as usual.
Could this simply be a failed indicator light on the face of the charger/maintainer?
Anybody else run into this?
Thanks.
Drifting
Joined: Oct 2005
Posts: 1,354
Likes: 717
From: Terrell North Carolina
More than likely, the maintainer has failed. The Corvette maintainer is made by CETEK, You can buy from Amazon & other vendors, or just buy a quality brand maintainer.of your choice.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
Did you unplug the AC power cord? The manual says the proper way to use the charger is to plug it into the car and then plug in the AC power cord. I doubt many people follow that procedure. Most of the time you can have it plugged into the AC first and it will still work when plugged into the car. That is most of the time, there are other times when you have to do it the correct way and there are other times you need to unplug it from AC power for several minutes. Mine has behaved like yours has several times, and I got it working again by unplugging it from the car and AC, letting it sit for 5 minutes, and then plugging it back into the car followed by plugging it into AC power. If that doesn't work, you may need a new charger.
Bill
Bill
Drifting
Joined: Sep 2019
Posts: 1,913
Likes: 1,957
From: Colo Spgs, CO
The C7 Battery Protection package came with a CTEK US 3300 Corvette Model 1051 Battery Charger, that's no longer made.
If you end up needing a replacement, a number of suitable (12V Lead-Acid) models are shown here, including MXS 5.0 NA, MULTI US 7002, US 0.8, CT5 TIME TO GO NA, MUS 4.3 TEST&CHARGE, and MUS 4.3 POLAR. To use them with our cars' rear charging port, you'll need to add a INDICATOR CIG PLUG accessory. They're available from numerous retailers, including Amazon, so it pays to shop around for the best deal. Good luck!
If you end up needing a replacement, a number of suitable (12V Lead-Acid) models are shown here, including MXS 5.0 NA, MULTI US 7002, US 0.8, CT5 TIME TO GO NA, MUS 4.3 TEST&CHARGE, and MUS 4.3 POLAR. To use them with our cars' rear charging port, you'll need to add a INDICATOR CIG PLUG accessory. They're available from numerous retailers, including Amazon, so it pays to shop around for the best deal. Good luck!
Last edited by NortonCO; Aug 28, 2025 at 02:20 PM.
Melting Slicks
Joined: Feb 2018
Posts: 2,183
Likes: 1,049
From: North Texas
Battery Tender 1.25 Amp maintainer is the way to go.
But beware, their warranty is subpar. Actually, it sucks......
If you're not an electronic tech that can trouble shoot and repair the maintainer yourself, it will be cheaper and less hassle just to buy a new one.
I myself have always just repaired the bad units, but then again, I have a background in electronics.
But beware, their warranty is subpar. Actually, it sucks......
If you're not an electronic tech that can trouble shoot and repair the maintainer yourself, it will be cheaper and less hassle just to buy a new one.
I myself have always just repaired the bad units, but then again, I have a background in electronics.
Last edited by Tinkertech; Aug 29, 2025 at 08:12 AM.
Thread Starter
Advanced
Joined: Jul 2012
Posts: 53
Likes: 11
From: Point Clear, Alabama
Replaced unit
Thank you for the good ideas and suggestions.
I replaced the non-functioning OEM unit with a CETEC MXS 5.0.
It immediately began to work properly. The battery was not as well charged as I thought it was.
We've had some significant thunderstorms recently with one lightning strike close by enough to trigger one of our GFI sockets.
Maybe one of those got the original maintainer.
I replaced the non-functioning OEM unit with a CETEC MXS 5.0.
It immediately began to work properly. The battery was not as well charged as I thought it was.
We've had some significant thunderstorms recently with one lightning strike close by enough to trigger one of our GFI sockets.
Maybe one of those got the original maintainer.
