Grady White Marlin 2006. I have disconnected all the ground wires (but not the engine earth) from the battery, but my bilge pump still operates in automatic mode. This suggests that the bilge pump is grounded to the motor somehow? Can anyone shed light on this interesting quirk?
Where is the Ground?
- Thread starter garyvoss
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Hookup1
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Download the GW Owners Manual from GW site. Look at the wiring diagram. Will show how bilge pumps are wired and fused.
Hi Hookup1. I have done this. My drawings show only the positive sides - not the ground. The ground is just shown as a ground symbol - where the wires actually run or connect is anyones guess!
Hookup1
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On my boat they are direct to the battery. Positive sides are fused. Get back there and follow the wires. Take the miscellaneous black wires off one at a time. On my boat they connect to an automotive style battery terminal. I installed them to keep the connections together when battery is disconnected for replacement. The positive wires go to the hot side on the back of the DC switches. In-line fuse is near the aft pump underneath a shelf above the pump (terrible location). Not sure where the fuse is for the forward bilge pump (may be next to the aft one).
How many batteries and did you disconnect them all?
There should have be a blach smaller guaage cable connected to one of the battery negative terminals in addition to the fatter black cable. The smaller size wire is the main ground for accessories.
Sardinia306Canyon
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My Canyon has a automatic Bilge Pump fuse with the +12V cable on the battery switch panel, but not sure where the -12V is connected.
You may check somewhere there where the battery switches on your Marlin are, there may be another -12V bus bar.
Chris
You may check somewhere there where the battery switches on your Marlin are, there may be another -12V bus bar.
Chris
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My grady had all three grounds for Bilge pumps and Memory spliced to a single larger black wire with a ring terminal to to -12V of the house battery.
This was even though the Fwd bilge and Memory +12V are fed from the "2" post of the battery switch.
This was even though the Fwd bilge and Memory +12V are fed from the "2" post of the battery switch.
Are you saying that the bilge pump is running constantly?
Or, it actually sounds like you want to disable the auto function? If that's the case, why?
But... just remove the fuse (or flip the breaker) for the auto side of the pump.
If you remove the ground... won't you also be eliminating the manual control of the pump? In "most" cases, there is a single ground with two hot leads.
Oh... you said you disconnected the grounds from the "battery"... don't you have more than one battery?
Does one of the battery's have a ground that goes to a bus bar? I can't say what is going on with your boat, but best practice is that accessories are NOT all grounded via a battery terminal... instead through a common bus bar. Look for that.
Or, it actually sounds like you want to disable the auto function? If that's the case, why?
But... just remove the fuse (or flip the breaker) for the auto side of the pump.
If you remove the ground... won't you also be eliminating the manual control of the pump? In "most" cases, there is a single ground with two hot leads.
Oh... you said you disconnected the grounds from the "battery"... don't you have more than one battery?
Does one of the battery's have a ground that goes to a bus bar? I can't say what is going on with your boat, but best practice is that accessories are NOT all grounded via a battery terminal... instead through a common bus bar. Look for that.
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