Almost no electricle power till car is started?

[svxsubaru1]

I just started driving my SVX again, and now the car almost has not electrical power before you start it up. The electric seat belts barley move, the CD player wont work, and the car will not turn over. Luckily I have been able to bump start to get it going, and every time it turns on all power that the car should have in the electrical system come back and every thing works fine. Once the car is warmed up it will sometimes restart with out a jump, but its not 100%. The car has a fairly new battery about 1.5 years old, it has a new alternator, a new ignition switch, and i did additional grounding, and have replaced the negative battery cable because of corrosion, but i still have this problem. Any ideas? Thanks.