What the freaking crap is up?

I have a 90 rs with a v-6. the battery has been draining out in about 6 hours to stone death. i bought a new battery the same problem. i bought a new alternator and the f-ing thing doesnt even work. took it back to the place i bought it and the hooked it up and said it did. i got another alternator and the same damn thing. i have gone over diagram after diagram and have found nothing that can help. i cant find a short and i cant find any fuses. there is good contenuity throught the system as there should be i dont know whats up any ideas? Jess

i had a 87 jeep comanchee that had a similar problem.
it would only crank some times and others it needed a jump. it was (after a few trails and errors) a battery cable. it had continuity through out. the problem is a digital meter may read good but the contact is so weak the amps are not getting through. maybe this will help

if you have an amp try disconnecting it for a few days too.