Brake light stays on and the speedo don't work!

[Sinners Saint]

I drove the truck to my sisters for christmas, everything was working as normal. When I left her house the brake light did'nt shut off after I released the e-brake, When I started driving down the street the speedometer was'nt reading, and then shot all the way over. While driving I could'nt set the cruise control and the speedo would jump around from 40 to 80 to 0 and anywhere in between. I also noticed that when I put my blinker on the speedo would go back and forth with the timing of the blinker. At first I was thinkng my speedo sendor went out but I really don't know since its doing all this other crazy shit. Anyone ever have this problem, got any ideas?

 

[DEERE3594]

How are all off your grounds? sounds like a bad ground or connection some where

 

[Sinners Saint]

I can't seem to find any broke or loose grouds, I will have to look again tomorrow.

 

[bison]

faulty brake switch?

 

[Brooklyn Tow]

Altenator...WAG