I picked up a broken Black & Decker electric lawn mower MM275. Previous owner said it just stopped running. Took off the switch cover and pressed the switch button a couple of times. The 1st time nothing, the 2nd time the motor started running but then one of the switch contacts started smoking. Bought a replacement (681064-01 switch) but forgot to mark which of the four wires connected to which connectors on the switch. So I know only one of them: the contact that was smoking that had one of the 2 black wires connected to it. Got the new parts and then tried to connect it. Since I know very little about electricity, and also since I had 3 wires (2nd black, red, white) that had to be connected to 3 connectors, I decided to simply try the 6 different combinations. What I saw for at least 4 out of those 6 combinations was this: the blade would start spinning but then after about 1/2 second the circuit breaker would get tripped as if there was some sort of short circuit somewhere in the mower. Does this mean that there is something wrong with the motor? When I tested it with the old switch, even though it was smoking, the motor continued running and the circuit breaker was not getting tripped. So I am hoping that the motor is actually OK. What else could be wrong? Or is this the motor? Thanks!