Came out to summer home and found the control box that controls the well pump constantly clicking on and off. I called to order a Grundfos control box model SA-SPM4 and they told me to use an SA-SPM5 and I also ordered a pressure switch with a safety for pressure going under 20 psi and it would shut off and that would save the motor. Now my problem is that the pump will run for 20 seconds and then shut off and when it shuts off it blows the fuses (this is not a circuit breaker it is a regular fuse). I would like to know if it could now be that the pump itself is bad. The pump is 25 years old; however, the well is only used for lawn watering as house is hooked up to city water. The pump is a 3 wire pump with capacitor start and I was wondering if I can bypass that and jump the pump wires or there a way to test the wires coming from the pump for a short?