I'm curious what's the proper method for diagnosing an electrical failure for a pump. I've installed /replaced tons, as well narrowed the issue to the pump. But I've never known the proper technique for a true diagnosis. I watched an electrician once, though I don't remember exactly what he did and I'm not sure I actually believed his answer. I believe he did a simple continuity test between the hot and neutral. Basically the other day I misdiagnosed and thought the pump was bad. I verified the Relay was good and thought the pump was bad. After replacement I had the same issue- come down find out a ' on / off ' switch downstream of the relay was bad and causing the breaker to flip. MY curiosity and determination got the best of me to figure it all out. As I totally did an electricians job. Because of this I want to try and implement a policy - a few basic tests to determine that the irrigation system is not the cause and to determine if the pump is bad . Anything else it needs an electrician.