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Hi,This is risky business, not responsible for damages on your end. We *keep going until *you are happy. I come and go. be patient
You can test between the two wires that supply power to the pool timer with a 'multi meter'
If however one is black, the other is white, and there is a green.. thats the wire coding used for 110v... 220v has a coding of blank and red.
but you still need to verify with a meter.
Now thats JUST the power to run the timer.
The switches built into the timer to turn things on and off could be any voltage.. you need a meter to verify such voltage, color codes there will be even less reliable.
You can buy a multi meter at a hardware store... look for a better one, 30 dollars of so.
Let me know if you need further elaboration, Phil