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Step 3) Using the template, transfer the bolt pattern and central hub cutout to the aluminum angle iron and then drill out the holes and cut out the opening for the hub. The holes were easily drilled, but the larger cutout for the wiper motor hub was more challenging. We used a hacksaw to remove most of the material and then finished it off using a dremel tool to get the final shape. After the holes are cut, mount your wiper motor to the angle iron and make sure everything fits.
Step 4) Your wiper motor will have 3 terminals – high speed, low speed and the ground (the ground terminal is probably connected to the motor housing). For a Flying Crank Ghost you will be using the low speed and ground terminals.
Now examine the pinout configuration from your computer power supply – the diagram shown is from an ATX power supply. ATX power supplies are switched-mode power supplies – which means they must have a load connected to operate properly – the power supply will check for the load using the voltage sense (or power sense) wire.
It may look complicated, but you really only need to find 4 pins: 2 black ground wires, the green power-on wire for the supply, and an orange 3.3V wire to get the lowest speed for your ghost. If using an ATX power supply, conveniently the voltage sense wire is already configured with a 3.3V line to Pin 11. Make note of the wires you will use and then cut all the wires to remove them from the plug, bundle all the other wires together using a tie wrap – you won’t be using them.
- Connect the 3.3V and voltage sense wires from Pin 11 to the low-speed terminal on the wiper motor.
- Connect one of the ground wires from the power supply to the ground terminal on the wiper motor.
- The green 12V wire is the switch wire for the power supply, our plan was to control the entire ghost assembly from the extension cord so we just connected the green wire to a black ground wire using a wire nut – you could also install a switch if you want to control the ghost movement separately.
- Mount the power supply to the aluminum angle iron (we just used zip ties to secure it) and make the connections to the wiper motor.