Hi guys, long time lurker, first time poster. My girlfriend and I have quite an assortment of cars ranging from our 48 Fiat to the Crossfire including 4 Germans, 2 Italians and 6 English, so electrical gremlins are not a new experience here. So our Crossfire battery died, was of unknown age, it was in the car when we bought it and I didn't bother trying to decode the production date, I just replaced it. Everything was fine for a coupe of weeks but then, it's dead. Jumped it and let it run, everything seemed OK for a couple of days then dead again. Next step, I put in a different thought to be good battery from another car in our fleet and after a bit it is dead, so I'm confident we have a draw. I do a search and read about the lock unit in the trunk, strip it down and everything is dry as a bone, but while I'm in there I pull the plug in the floor in the event there is a leak, at this point everything with the locks is working fine. Next step I attach my VOM and start pulling fuses, but it doesn't show any change, staying pretty steady at .02-.03 the whole time. At this point I pull the alternator, tape off the wiring and let it sit with a fresh charge for 2 full days and everything seems fine, starts like a champ. Before I bought a new alternator I let it sit a few more days because the diodes in the alternator all test OK. The next day we get heavy rain so I let it sit another day and its now dead again.

So, it seems it is time to try again, so I charge the battery and now I have no interior light and when you click the remote the lights flash, but not activity with the pump or action at the door. Out with the VOM and I start by pulling the #9 and #35 fuses that show up in every thread I can find(who numbered the fuses???) but no change in the draw, but it is up, so I start pulling fuses one by one until I get to #23 "Soundbooster", the draw drops, so I figure I'm on the right path, leave the fuse out, put the alternator back on and leave it 3 days and she starts perfectly. I put the fuse back in and pulled the radio fuse and the draw didn't drop, so I don't think the head unit is supplying trigger power to the amp while it is off.

So, I think I have a problem with the amp, is this at all common? I never saw it mentioned in any threads I found concerning electrical draw. The locking has me concerned as well since the lights flash but no pump, any ideas? I suspect the interior light failure is somehow tied into this. Any ideas from the collective knowledge here?

Thanks in advance for any ideas, fortunately we have the luxury of not having to use this car regularly so I'm not in a rush, I want to do the right thing and not just be a part changer like many of the the "mechanics" out there.