We spent last week on our 1990 Hunter 30, and noticed some odd behavior on the water pressure/pump breaker. When shutting it off, the indicator light fades very, very slowly. Eventually, it took up to five minutes to go completely out. I tried shutting the DC panel off, and then just the house battery, then both batteries, and it still remains on, then fades. If power is shut off to the whole panel, how can an indicator light remain on, then fade? From where is it getting power?Dean Strongs/v Synchrony