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I replaced my original battery with an AC Delco on my 2019 C7. The replacement process was easy and straight forward. After replacement the car will not start. It's getting power as evidenced by interior lights and windows working, however the door locks aren't working and it's a no go on starting--absolutely nothing happens. Dash and info panel don't wake up. Tried disconnecting/reconnecting the battery at the terminal as well as inserting the key fob into the steering column. Nothing seems to have any effect. Thoughts?
Recheck every nut on top of battery and make sure everything aligns correctly.
Check the small black wire is attached to the negative terminal and not damaged.
If all checks out possible bad new battery.
Recheck every nut on top of battery and make sure everything aligns correctly.
Check the small black wire is attached to the negative terminal and not damaged.
If all checks out possible bad new battery.
In addition to all of this make sure your battery is fully charged. If the battery has been sitting on the shelf for months it could have slowly drained.
If you disconnected the heavy red wire from the fuse buss on top of the battery - make sure the ring lug on the wire is in good "flat" physical contact with the flat metal buss before tightening. The wire fits down into a notch as seen in the pic below. Also make sure the small black wire is still attached to the negative battery cable (important for charging). If still no joy check each fuse on top of the battery - should be 12 v on each end of each fuse when measured against the negative battery post.
These are the common problems after battery replacement.
Red wire properly connected to fuse bus on top of battery.
Small black sensing wire connected to negative battery cable. See blue paint spot.
Thanks for the help, it's much appreciated. I've double checked everything you've mentioned except the fuses which I'll do in the morning. thanks again!
If you disconnected the heavy red wire from the fuse buss on top of the battery - make sure the ring lug on the wire is in good "flat" physical contact with the flat metal buss before tightening. The wire fits down into a notch as seen in the pic below…………..
Let us know how you make out.
GL
Ron
Most common error in replacing the battery with a new one is failing to correctly align the starter cable positive lug into its gated slot after the 350A fuse. Just be a bit slightly off and the lug will fail to make good connection. I made the same error 18 months ago. Theses kind of forum issue reports are literally weekly!
I never removed the red wire from the fuse bus. It seemed unnecessary. I only removed the Pos and Neg connectors from the actual battery terminals.
Lyle at C&S Corvettes recommended the following although I'm unclear as to what exactly he means and have asked him for clarification: He said to "Disconnect the battery again and attach the +/- cable ends together for 10 minutes (obviously AWAY .from the battery!). This will reset your system."
Thanks to everyone who has offered suggestions. It's much appreciated!
I never removed the red wire from the fuse bus. It seemed unnecessary. I only removed the Pos and Neg connectors from the actual battery terminals.
Lyle at C&S Corvettes recommended the following although I'm unclear as to what exactly he means and have asked him for clarification: He said to "Disconnect the battery again and attach the +/- cable ends together for 10 minutes (obviously AWAY .from the battery!). This will reset your system."
Thanks to everyone who has offered suggestions. It's much appreciated!
Joe
I'm thinking the logic is that it'll help draw out residual electricity in the system (from capacitors and stuff) Essentially the same thing as disconnecting the battery and letting it sit 15-30 minutes. I don't think doing that is necessary disconnecting the battery and letting it sit for 15-30 minutes should be sufficient. I could be wrong so someone with an electrical background can correct me if I'm wrong.
Agree - just disconnect negative battery cable for 30 min. The intent is to make sure all microprocessors do a hard reboot. Removing the positive battery cable also and touching the cables together just forces any capacitors to discharge quickly - in my opinion an unnecessary risk.
You MAY have to reindex the windows and redo some of the seat memory and radio presets - depends on how long power is removed. Anyway a good excuse to go through all the settings menus.
Did you check the fuses on top of the battery?
Have you checked battery voltage a while after disconnecting any charger? New batteries can be bad on the shelf - always ask for a quick test when purchasing a battery.
I never removed the red wire from the fuse bus. It seemed unnecessary. I only removed the Pos and Neg connectors from the actual battery terminals.
Lyle at C&S Corvettes recommended the following although I'm unclear as to what exactly he means and have asked him for clarification: He said to "Disconnect the battery again and attach the +/- cable ends together for 10 minutes (obviously AWAY .from the battery!). This will reset your system."
Thanks to everyone who has offered suggestions. It's much appreciated!
Joe
were you able to solve this problem? I’m having same issue now
Easy way to discharge any residual power is to just step on the brakes after the battery is disconnected.
But, there is always a but, some electronic circuits with large capacitors are isolated from the direct power input line and will need additional time to discharge. i.e. air bags.
But we are talking about a battery change and none of this is really needed.
any time you disconnect the battery and reconnect not the car wont start on the first try. connect the battery and hit the start button. it will likely click and do nothing. wait a minute then press the brake and hit the button again. it will start then and you have to reset window settings and seats and such. a drive cycle will be required for emissions.
most people disconnect and reconnect the battery and this starts the cycle all over again gets people thinking theres an issue when there isnt
Replaced Battery No Start
Most common error in replacing the battery with a new one is failing to correctly align the starter cable positive lug into its gated slot after the 350A fuse. Just be a bit slightly off and the lug will fail to make good connection. I made the same error 18 months ago. Theses kind of forum issue reports are literally weekly!
