Tape off end of both of the red leads.
Evaporative cooler motor wiring diagram.
This diagram is a basic schematic and is not intended to represent all methods of installation because of various cord plug and pump configurations.
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Swamp cooler wiring diagram.
Amazon affiliate link to swamp cooler switch.
Once again if it is practical placing the switch on the outide of the flue chase can be a good option.
The swamp cooler wiring.
The motor in a swamp cooler turns a blower which moves air in from outside the cooler through evaporative pads and out through a vent or ducting into the living area.
See evaporative cooler installation instructions and motor and pump instructions for proper motor and pump wiring.
Refer to above diagram the green.
When a single speed motor is used do not use the red lead on the receptacle and motor plug wiring.
Wiring a evaporative swamp cooler switch here is how to wire up a 120 volt swamp cooler switch controller here for a plete write up on wiring a swamp cooler controls how to wire a swamp cooler motor how to wire a swamp cooler motor by john cagney the manufacturers of blower motors do not subscribe to a universal color code for their wiring.
Be sure motor pump and cooler are properly grounded.
Here is how to wire up a 120 volt swamp cooler switch controller.
This can be tricky as the route must communicate with unfinished space to the power source and also communicate with the attic.