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"I removed all negative wires from my battery, turned my ohm meter on, and put the black probe on the negative wires, and the red probe on the positive terminal. It shows a draw of 0.35. Then I tried this with the bilge pump plug disconnected in the stern hatch. It then showed a 1.92 draw. The present reading at the terminals is 13.14"
Tell me more about your switch settings and connection. I'm not shure what you were reading but it probably doesn't have any thing to do with the problem. what you want to measure is any current that might be flowing with everything shut OFF. the way to do that is to disconect the - terminal as you did, then put the meter in 10A and plug the test leads into the 10A sockets on the meter. connect the ground or black probe to the neg battery post and the red or 10A probe ot the black wire going to the boat. If you read nothing then move the red meter lead to the + socket on the meter and select the highest ma position on the meter switch. decrease this setting untill you get a reading. this is the number that you need to compute battery drain in the all off condition. You could then caculate this against the amp/hour rating for you battery and come up with discharge time.
OR install the switch. But then you will lose any memory in electronic devices with a volitile memory.
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