Electrical drain, battery won't maintain charge?

[36tudordeluxe]

Think I may have isolated the problem and owe an apology to those who suggested a diode as the culprit.............maybe. When I remove the fuse for the clock the positive cable no longer sparks when hooking up. Do quartz converted clocks have diodes in them? This clock was just done by Williamson's. Can I use my meter from fuse panel connection to the power lead from the clock; what setting do I set my meter on and what value should the readout be?