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That sounds like a shortstop breaker is opening up due to to either low voltage OR an excessive current draw from the motor. That can be due to one that is failing or from a dirty ground lead. I would take a small digital multimeter and check the actual operating DC voltage at the pump motor when the power is actuated and see how much, if any it drops. Then get back to me and we can discuss some solutions here. All follow ups are included in our fee.
Just checking back in to see if you perhaps missed my earlier response a few days ago? Easy to do with the volumes of e-mail most of us get every day. Or sometimes these end up in the spam file. Please let me know if you need me to resend it or still need additional input on this issue. Thanks!
Thanks for getting back to me, Ted. Glad to hear that it cleared up and the second battery should help. Please take the time to enter in a Star Rating as that is the only way I get credit from the site for the time spent assisting you here. Thanks!