Truck won't start! Message says "check brake system"

Truck won't start it says "check brake system" on my 2016 trd sport. I disconnected the battery and again it keeps telling me to check the braking system. The brake lights are working and the audio system is working. Help please!!

 

What’s the security light doing? Have a scan tool available to check for codes?

 

Check your fuses and relays. Once I disconnected a battery and reconnected it and blew the ignition relay.

 

Thanks

 

It was a fun hour of finding out why it wouldn’t start. Had to look under the fuse box too.

 

I the risk of sounding stupid. What was the problem ? A fuse, if so why ?

 

It started this morning not sure what was wrong with it. I had been messing around with it I was going to install a front camera but changed my mind,
and I had never even unplugged or cut anything. Oh well thanks for your input though, appreciate your help

 

I ended up blowing up the ignition relay on a Camry and then blew up the fuse for the fuse box.

 

this happened to me when I was changing out my tail lights... mis wired the polarities on the wires blew a fuse and got the same message with no start blows my mind that a tail light fuse keeps the truck from starting smh...