So the fuse definitely “pops” hard every time. I’ll try out the 20amp/5amp relay activation method you described above this weekend.There might have been.
It was stated in reply #6 that the water pump draws 6-10 Amps
With the pump positive going through a 20A fuse and then to the battery positive post and then the negative wire off of the pump going to the same battery ground, the fuse never blows.
If then the pumps positive wire were to be wired through a relay and the activation coil is wired with one side going through a 5A fuse and then this connected to the battery positive post, then when the activation coils other wire is then touched to the same battery ground, then the relay will click, then power get's pulled through the 20A fuse to the pump and with it grounded will allow the pump to pump or spin.
If when touching the activations wire to ground causes the 5A fuse to blow, then there is a short or too low of a resistance in the activation coil, If the 20A fuse were to blow, then the relay has to be connecting the supply of power to a ground and the only ground would be on the one end of the coils activation wire.
If a fuse blows very quickly and pops hard, to me this indicates a real good direct short. If it glows a bit and then blows, on let's say a 20A fuse, then the current draw might actually be 30A. Remember that a 20A fuse willpass 20A all day long and probably pass 25A also all day but then if asked to pass 30A it doesn't happen right away but there is a time delay and if the current is increased to 35A, the time delay s shorter and then if asked to pass 100A, then in a split second it pops.
Appreciate the help