The wiring diagram should be on the motor itself right by the terminal hookups. I recently replaced mine but it is not exactly the same model since mine is a 1.5 HP uprated and I replaced a single speed motor with the two speed motor and then wired the speed selection into my Goldline controller so I had to pull new wires. However, for general info you might want to download from the A.O. Smith Literature Library website their #3400, MMU Pump Booklet _Troubleshooting Manual 2006 (first download link on the page) since it does include wiring diagrams (both internal and external) for their pump motors. It is a bit technical so if you don't know how to read them then, as PoolDoc said, get someone to do it for you.