Just replaced battery 2012 SRX won't start, no lights, nothing.
Car had to be jumped yesterday, battery at 14%. Wouldn't start again today.
Replaced battery but now no lights, etc....won't start.
My buick regal was doing that, turned out to be bad alternator draining battery. Good luck.
I agree with the alternator suggestion, that is most likely what started the whole problem, but I think you may have caused yourself more problems. First check and make sure the battery is installed correctly, positive to positive and negative to negative, if it checks good then you have scrambled the BCM's factory presets by removing the battery without using the preset saver tool, this requires a trip to the dealer for a reflashing, if the battery was installed backwards then it most likely blew some main fuses in the power distribution box under the hood. In either case it will still have to go to the dealer.
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