Dead Battery on a 2026 1500 with 5.7 torque

[BobH2020]

I needs some serious answers here if anyone has one. I accidentally left my tailgate down yesterday and the bed light was on. When I came out this morning, I had absolutely no power. Couldn't even open the garage with the buttons on the visor. I've been reading about the etorque battery being a real pain. I tried jumping it the traditional way with no results. I've got a battery charger on it now. Multimeter reads 5.6 volts on the battery terminals. I could really use some advice. Truck has 5100 miles on it.

 

[mikeru]

The 48v etorque battery isn’t used for powering anything in the truck except the etorque MGU. It sounds like the bed light killed the main 12v battery. Hopefully it will be okay after charging it. The 48v etorque battery should not have been affected by this.

 

[crash68]

Multimeter reads 5.6 volts on the battery terminals.

You have a really dead battery, it's possible that an internal cell failed but let the battery charger run for several hours or even overnight and check the voltage again.

 

[1999 White C5 Coupe]

I needs some serious answers here if anyone has one. I accidentally left my tailgate down yesterday and the bed light was on. When I came out this morning, I had absolutely no power. Couldn't even open the garage with the buttons on the visor. I've been reading about the etorque battery being a real pain. I tried jumping it the traditional way with no results. I've got a battery charger on it now. Multimeter reads 5.6 volts on the battery terminals. I could really use some advice. Truck has 5100 miles on it.

Have it towed to the dealer for repair under the new car warranty.