djjdave1

Just decide the Vin number

Disconnect main alternator charging wire back to the battery. Disconnect neg cable first, then disconnect positive wire from back of alternator and tape the end of the wire so it can't touch and short out. Then reconnect your ground wire to the battery and see if you still have a drain. Could be bad diodes in alternator. Dave

Do you still have the old oil pressure sender try swapping the old one out see if your problem is the same you may have a bad oil sender Dave