I just acquired a 1989 Cat 27. Her batteries were not in her and so I replaced dead ones with new deep cycle marine batteries. I placed them in the space in the deep lazerette and hooked up the wires as they appeared to be from the bends in the wires. I put a large diameter red wire on each of the positive terminals. there is one thick black and one thinner black wire. I attached the thicker of the two to the battery that is situated closer to the center of the cockpit. the other remaining black (thin) to the negative terminal of the second battery. So far so good? here's the problem...when the battery selector switch is in position 1 it registers only 6 volts on the panel meter. Switching to all yields 12 volts. Finally, position 2 yields NO voltage. Any hints? I can snap a photo on Friday when I'm on it again. Gareth