New battery
CF Community Team
Joined: Apr 2016
Posts: 14,158
Likes: 7,439
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Start with the simple things first, are the connections clean & tight?
Safety Car
Joined: Dec 2012
Posts: 3,858
Likes: 1,863
From: St. Louis Metro East IL
OP,
You will lose window indexing and possibly radio presets, seat memory, and display settings depending how long the car is without power. I would personally run through all of the settings menus at some point once you have a known good battery.
Does the display layout change when you turn the rotary **** on the console to select Tour, Sport, or TRack mode? If not, your display is locked in one mode. You need to set display mode to Link to Drive Mode or choose the display mode that you prefer.
- using the right thumb buttons: Scroll left, then up/down to settings. Press OK. You should then be in the center.
- scroll up/down to Display Theme - scroll right
- select Tour, Sport, Track, or Link as desired. Press OK. You should be in the center.
- scroll to the left and up/down to Info or Perf. Press OK. You should be back in the center.
- scroll up/down until you find a sub display you like
- if in Sport personality you can scroll right and choose pocket gauges
For completeness after a battery change: verify battery connections are pushed down, level, then tightened. Verify that the small black wire is still connected to the negative battery clamp - it is very easy to break off.
Have fun exploring your display choices!
Ron
You will lose window indexing and possibly radio presets, seat memory, and display settings depending how long the car is without power. I would personally run through all of the settings menus at some point once you have a known good battery.
Does the display layout change when you turn the rotary **** on the console to select Tour, Sport, or TRack mode? If not, your display is locked in one mode. You need to set display mode to Link to Drive Mode or choose the display mode that you prefer.
- using the right thumb buttons: Scroll left, then up/down to settings. Press OK. You should then be in the center.
- scroll up/down to Display Theme - scroll right
- select Tour, Sport, Track, or Link as desired. Press OK. You should be in the center.
- scroll to the left and up/down to Info or Perf. Press OK. You should be back in the center.
- scroll up/down until you find a sub display you like
- if in Sport personality you can scroll right and choose pocket gauges
For completeness after a battery change: verify battery connections are pushed down, level, then tightened. Verify that the small black wire is still connected to the negative battery clamp - it is very easy to break off.
Have fun exploring your display choices!
Ron
Administrator
Joined: Mar 2001
Posts: 368,390
Likes: 24,795
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Great advice above and hopefully it will get your display back to working again.
Safety Car
Joined: Nov 1999
Posts: 4,289
Likes: 1,163
From: Green and Wet Western Oregon
2023 C7 of the Year Winner - Unmodified
2018 C6 of Year Winner
Go back and re-tighten every nut on the top of the battery. If there is any gap in that "L" bracket it could cause intermittant interruptions.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Dec 2012
Posts: 3,858
Likes: 1,863
From: St. Louis Metro East IL
I can't recall anyone saying they have used some kind of voltage backup on C6 or C7. As I noted above, the longer the voltage is low, the more settings may be lost. Note that only the trunk / hatch 12 v receptacle is hot when the ignition is off. It is not a bad idea to go through the settings occasionally...
Ron
Ron
Burning Brakes
Joined: Jun 2023
Posts: 956
Likes: 440
From: FL
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Drifting
Joined: Sep 2019
Posts: 1,355
Likes: 635
From: St. Louis
No - it gets hot because you are effectively overcharging the 9volt battery to 13.5 volts until you disconnect the cars battery. Sounds like a bad idea! Overcharged batteries have been known to explode / catch on fire.
Race Director
Joined: Mar 2001
Posts: 19,965
Likes: 6,770
From: Bonneville Salt Flats
Because of issues with the stupid positive buss-plate and every instruction I found saying to disassemble it (NOT necessary, btw), I had my battery out or unconnected for nearly all of several days as I diagnosed and finally corrected the issue. All I had to reset on my '18 base St'ray was the window indexing which the DIC told me, along with how to do so when I finally got full power back up correctly. 
