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Short circuit?

Old 06-04-2016, 07:53 AM
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Default Short circuit?

I was emptying my starboard fish box on my 2003 Hydrasports 28 WA with a macerator pump when the pump stopped working. I assumed it was the fuse, but couldn't find any blown fuses. Also, the port macerator now doesn't work, (the switches are right next to each other), but the pumps are separate. If I have something else on the same bus (the windshield wiper) running when I activate the switch, it stops. I ruled out a bad switch, since I was able to run the wiper off this switch by swapping the wires. I assume I must have shorted out the wire somewhere, but where do I start looking, and why would the other macerator also not work? Would they share the same ground? Or does this sound like one wire melted and shorted the other as well? Frustrating to say the least! Any help is appreciated!
Old 06-04-2016, 12:52 PM
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Originally Posted by Scubadoc33 View Post
I was emptying my starboard fish box on my 2003 Hydrasports 28 WA with a macerator pump when the pump stopped working. I assumed it was the fuse, but couldn't find any blown fuses. Also, the port macerator now doesn't work, (the switches are right next to each other), but the pumps are separate. If I have something else on the same bus (the windshield wiper) running when I activate the switch, it stops. I ruled out a bad switch, since I was able to run the wiper off this switch by swapping the wires. I assume I must have shorted out the wire somewhere, but where do I start looking, and why would the other macerator also not work? Would they share the same ground? Or does this sound like one wire melted and shorted the other as well? Frustrating to say the least! Any help is appreciated!
I will assume you have checked the breaker for the port unit that stopped working as well. I imagine that all these things share grounds. You probably got something stuck in ur Mac pump and fried it. Basically welding the pos and neg inside. This probably shorted the other out or at least it's breaker flipped.
Cut the ground off starboard pump and see what happens.
Old 06-04-2016, 03:58 PM
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That was my next move, cut the wires and hook up to the battery directly. I will try the starboard ground first.
Old 06-05-2016, 07:30 AM
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Cut the ground to the starboard pump, the port still didn't work and had the same "draw' effect on the wiper. Cut the hot wire with no effect. Hooked the pump up to an external battery and it worked, so I assume it is a short in the hot wire between the helm and the pump, that also shorted the port wire. I will connect the port pump to the external battery next to test. Sounds like I need to run new wire from the helm switch to the pumps. would there usually be a bus bar between the helm switch and the pump? At least I don't need a new pump, but getting the wires snaked is going to suck!! May need to hire some help.
Old 06-05-2016, 07:45 AM
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Originally Posted by Scubadoc33 View Post
Cut the ground to the starboard pump, the port still didn't work and had the same "draw' effect on the wiper. Cut the hot wire with no effect. Hooked the pump up to an external battery and it worked, so I assume it is a short in the hot wire between the helm and the pump, that also shorted the port wire. I will connect the port pump to the external battery next to test. Sounds like I need to run new wire from the helm switch to the pumps. would there usually be a bus bar between the helm switch and the pump? At least I don't need a new pump, but getting the wires snaked is going to suck!! May need to hire some help.
Usually no buss bar but a breaker is very common on something that draws that much amperage.
Old 06-05-2016, 10:07 AM
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That is the confusing part. The fuse should have gone first. But I'm pretty sure all the helm switches are all on two fuses, both of which looked fine, and the other helm electrics work. It is a 40amp fuse though, so may not have failed quickly enough.

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