Do I need a new battery?

Asked by Dec 12, 2013 at 09:04 AM about the 2004 Chevrolet TrailBlazer

Question type: Maintenance & Repair

Frequently when I go to start by vehicle, my radio has reset to 1200 am and the brake light comes on.

1 Answer

1,975

you could have a bad ground or a short somewhere. or could be something in your ignition... is the stereo stock or has it been changed. if it has been changed in behind there would be a good place to start looking for your short as most radios are turned on and off by ignition but the memory wire is usually a low current signal powered by the ecm. I would start by cleaning the terminals on your battery and using either dialectic grease or vasoline to keep from corroding. if it were your battery if would not want to start the next day or barely start. if you would like to test your battery napa should do it on site without any cost. (double check though)

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