i have a 68 gmc 3/4 ton where i just rpaced the starter ,regulator and alt is ok but system is still draining battery after putting back the way it came out i am replacing coil tommoroww i am grounded just off the bolt of the starter where in the wiring system do you think i'm losing juice i've put the battery charger on it several times only to see it drain an hour later thanks for your help