What specifically are you using to measure the current? That seems high with no light visibly on and no motors running. If this is a stock setup what are the high current consuming devices, assuming that something hasn't failed?

1) ignition
2) A/C clutch
3) heater blower motor
4) headlights
5) rear window defogger
6) power windows
7) horn
8) windshield wiper

There just aren't that many devices that can draw that kind of current constantly and not have some kind of problem show up.