2008 Tundra has no electrical power

Hi guys. This is my first post, but I’m hoping someone can help. My 08 Tundra has zero electrical power after attempting to start. I’ve checked the battery voltage and it read 12.89, so it appears the alternator is charging. I drove for a month with a brand new battery, but it refused to start today. I cranked it twice and the engine attempted to fire, then nothing. I have zero working lights on the dash and throughout the truck. Has anyone seen anything like this? Like I said, the battery has voltage, it’s just not getting to the rest of the truck. Thanks.

 

Any chance you new battery was ever hooked up backwards? Sounds like it could be a bad main fuse, no power to interior fuse box.

Does it still crank or did you look power to the entire engine fuse box as well?

 

Start with basics. Check connections for contact and corrosion. Check for stored codes. Check for a burnt fuse. Check voltage at power ports; should be close to voltage at battery terminals.