In my 47 Ford coupe I have a parasitic draw. It will drain the battery in about a week. The battery is new. I have pulled the fuses one at a time to check the circuits, but can't find a problem. I checked the diode trio in the alternator and it checks out as OK. I was wondering if a relay can cause a parasitic draw but still function as intended. I'm using relays for the headlights (hi/lo beams) , brake lights and rad fan in addition to the horn, 4 way flashers and the signal lights. Any thoughts would be greatly appreciated.