Tried posting this and didn't go through, so if it's a repeat then sorry about that. Anyway, on my 1969 CL350 the battery charges good but drains down after a couple days sitting. I tested the rectifier with the diode function on my multimeter. All wires checked good except the green to yellow, which read "1" in both directions. I verified this by using a test lamp and battery and there was no light, or continuity, in either direction. So it looks like a bad rectifier. MY QUESTION IS THIS: if that diode is not flowing in either direction, where the heck is the current draining to? I could understand if it improperly flowed both directions. Also, should you just check wire to wire, or wire to ground (mounting stud) as well? Thanks a lot for any insight on this.