No speedometer/odmeter

2005 Taco v6 4wd 250k mi. I disconnected the negative battery terminal and cleaned it and put it back on. I turn the truck on the next morning and had a blown tail light fuse and no speedometer or odometer and brake light, abs light and check engine light we're all on. And my gas gauge fluctuates up and down. Code reader says speed sensor on the transmission (replaced) and three of the four ABS sensors on the wheels. HELP. I fear the DEALER !!!

 

Just a suggestion, why not just disconnect the battery altogether (disconnect both positive and negative terminals) and leave disconnected for about 5 mins. then reconnect both terminals and see what happens? Hopefully the Tacoma's ECU will reset itself back to normal?

If not then you've got deeper issues.

 

X2^^^^ You Should Always Disconnect both terminals even if you only want to disconnect one.
If you disconnect the negative cable first, and reconnect it last, then the car is not electrically connected to the negative battery terminal.The negative cable should always be disconnected first, and re-connected last.