i have a tekin rx8 setup in an losi xxl running 4s with 2000kv motor dx3s controller and tele. i did strap the battery in properly as i was only showing someone the truck. got a little carried away and went fast etc battery strap came loose battery fell out on the dirt running deans connecters it would of given the connector and wires a bit of pull but no wires are broken but now i have nothing working at all no steering or anything. it still makes a little arc when i connect the battery but nothing else. i have powered up the rest of the system with out the esc connected using a rx pack the controller rx etc are fine. any ideas???

go to the RX8 1/8th scale official posting for tekin and Randy Pike can help you with that. or call Tekin service. its in the elect off road section

Sounds like the switch is either shot or one of the wires running from the switch is damaged or disconnected from the board.