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The relay is attached to the ECU.
 

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I had the same problem with my Varamax pump, the problem was the pins were in the wrong location from the factory, I swapped the pins, then got power, then had to keep turning on and off the pump to prime it and get coolant in there. Once the hydro lock was gone then it turned right on. I have a thread around here somewhere with pictures. Idk if this helps you.
 
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