Dead battery

Good afternoon,

You will need to charge the battery back to 12.6 volts. You will need a battery charger.

These are very difficult to jump due to the location of the cables. You can get a trickle charger at a parts store. Put it on the battery for about 3 hours and that should charge it back to full power.

https://www.2carpros.com/articles/how-to-charge-your-car-battery

Roy

Here's a link to jump-starting a dead battery:

https://www.2carpros.com/articles/how-to-jump-start-car-battery-using-jumper-cables

Check that out to be sure it was done correctly. Way too often we read here that someone connected the cables backward on one vehicle. At a minimum, if you're lucky, that will only result in a lot of blown fuses on the vehicle with the dead battery. It is not uncommon to permanently damage multiple computers.

Assuming the procedure was done correctly, there's two common reasons for the dead vehicle to not start. The first is less than perfect connections on one end of one of the cables. That can be identified by turning on its head lights and observing their brightness. If they're dim or off, wiggle the jumper cable's clamps until the lights become bright. Next, watch what happens to those head lights when you try to start the engine. Often they will pop dim at that instant. That's another indication of a bad connection on the jumper cables.

The second problem when a battery has been run totally dead is you have to leave the jumper cables connected for some time before you try to start the engine. It can take a good 15 - 20 minutes before the dead battery starts to take a charge. It takes that long for the acid in the battery to become conductive before it will start to take a charge. Until it has become sufficiently-charged, it is almost impossible to get enough current through the tiny jumper cable clamp connections to run the starter motor.

The better alternative is to connect a portable battery charger and charge the battery at a slow rate for a couple of hours.

Another problem to be aware of is it is somewhat common, when reconnecting a battery, or when connecting jumper cables to a dead battery, is for multiple fuses to blow for no apparent reason. That occurs because of the current surge from multiple computer memory circuits charging up. We can address that if more than simply charging the battery is needed.

Be aware too that a lot of engineers have designed in tricks to force you to visit the dealer after simply disconnecting or replacing the battery. Multiple computers will lock up and need the dealer to unlock them. GM is one of the manufacturers that started this trend, then most others copied them.

Also consider the vehicle might be in anti-theft mode after the dead battery is recharged. Use the key fob or a key in the driver's door lock to deactivate the system, then try to start the engine. (turn the key to the "unlock" position, then back to centered, to turn the anti-theft system off).

It can be jumped but getting a good connection on the negative cable due to its location is tough. Try putting the negative cable on the top of the motor.

Roy

Good luck.

Keep us informed.

Roy