Thanks for that (i think haha), gonna be a pain taking the thing apart. However i found that in fact the problem is a rogue black wire. Inside the fuse there are two black and two red wires (from recollection). A black and red wire are connected to the motor, another red wire is connected somewhere else (can;t quite remember)... however my other black wire has been disconnected from the circuit board. If i touch it to the circuit board, anywhere, i am able to get the motor to power up to 100%...
Can someone tell me where this wire goes?