A previous owner labelled one switch position house and the other as start. We've only been using the house battery, even for starting. However, I'm finding that the start battery's voltage is down to 11.5v even though we havent used it. I'm thinking the bilge pump is pulling power from it. Is the bilge pump typically wired to battery 1 or 2 when the battery selector switch is off?
Which battery is my bilge pump connected to?
- Thread starter Project_Mayhem
- Start date
Does the bilge pump run when the start battery selector is off? Need to trace the wire from the bilge pump.
Check the terminals on the house and starter batteries to see where the light weight connections are.
If by some weird chance the connection to the bilge pump is further down the wiring, pull the (+) main wire off the posts one at a time to see who powers your bilge pump.
If by some weird chance the connection to the bilge pump is further down the wiring, pull the (+) main wire off the posts one at a time to see who powers your bilge pump.
Actually, you have two issues:
1. To which battery is the bilge pump connected, and
2. why is one battery discharged.
as you have been told, trace the wiring. Nobody knows what a previous owner did to energize the pump or how he labeled the switch.
then trace how the two batteries are connected to the charger or via what interconnection, e.g., isolator, ACR, etc… they are interconnected.
1. To which battery is the bilge pump connected, and
2. why is one battery discharged.
as you have been told, trace the wiring. Nobody knows what a previous owner did to energize the pump or how he labeled the switch.
then trace how the two batteries are connected to the charger or via what interconnection, e.g., isolator, ACR, etc… they are interconnected.
Yes, I can trace the wiring but I was hoping someone could tell me how catalina wired this from the factory as the manual states that it's on even when the battery selector switch is off
Could you take the pos wire off one battery bank, and see if the pump turns on (lift the float to test)?
Do you have a bilge pump switch at the DC panel? If so, I would guess the house bank is powering the pump. But if you disconnect the pos from the house bank, and see if the pump turns on it should confirm.
Greg
Do you have a bilge pump switch at the DC panel? If so, I would guess the house bank is powering the pump. But if you disconnect the pos from the house bank, and see if the pump turns on it should confirm.
Greg
There's no telling what a PO might have done to the wiring.
And there’s no telling if the PO did something wrong (At night, in the dark, while drunk). Never trust the manual
YES !
They ran the wiring directly from the battery terminals. No ON/OFF switches in between. No battery selector. Just a breaker in between and that's likely on your DC panel.
That's what the manufacturer intended. Check post #8 as most PO's are absolutely out of their minds when it comes to things like this. Nothing is off the table when it comes to PO's. As a matter of fact, @Don S/V ILLusion has listed the conditions under which the PO most likely altered the the bilge pump wiring.
Last edited:
