When I had the alternator rebuilt some of the internal parts were upgraded, not sure of all the names but, shop informed me they could boost output to about 90 amps. How would I go about verifying this. And I think that my vacuum lock pump is draining my battery and causing all my problems. Would it be a proble to disconnect fuse #13 and test the battery voltage, or is their a fuse for the lock pump seperately?? And about my audio system I have 2 Alpine MRD-M500 amplifiers, which produce 500 watts continuous power each and 900 watts max. The amplifiers are turned down though, because my subs can only handle 300 watts continuous. I have a Monster 1 farad cap that supplies the voltage to the amplifiers after it receives it from the battery. About the wire, Moster 4 gauge wire an 80 amp fuse. I would really like to make this alternator work, seing as how I just spent $150 to have it rebuilt last friday. I did look into a custom alternator but after all the custom fabrication necessary to mount it, it seemed a bit too expensive for my tastes, probably close to $500. I have unplugged the amplifiers for now, until I get this whole electrical problem straight. I am kind of surprised that you all are oppossed to the idea of amplifiers in the car. Subwoofers are the best. It is like torture listening to music through those puny 3.5 speakers!!