Something in ABS draining battery

[MissVal38]

I have a 2000 Ford Explorer. For several days I noticed that when the brake was pressed, the battery gauge on the dashboard would drop a little. A few days later the ABS warning light came on and within a few minutes the battery was completely dead. I had the battery charged. The battery, alternator, and starter/cylinoid all checked out fine and the ABS light has not come back on since then. After the battery was charged, I was able to drive it for over an hour without any problem. I even turned it off for about an hour without any problem. However, if it is off for several hours, the battery will drain completely. Is it possible for a brake fuse or something in the brake system to drain a battery (based on the gauge dropping and the ABS light coming on)? If the battery cables are disconnected, the battery doesn't drain. Before I spend a lot of $$ on the vehicle, I want to get some opinions.

[BatteryMan]

Btteries do not drain completely that fast. Either you have a completely discharged battery that need at least 10-24 hrs on a 10amp battery charger, a shorted out battery, a bad alternator or a severe parasitic drain( not likely). Your ABS light is generally the first light to come on when you have a bad alternator. Followed by the amp light(looks like a battery), and your check engine light. Alternators can go bad in many different ways and just because it tested good doesn't mean it is good. If you really want to check it the Alt. needs to be on the vehicle with a fully charged battery. Start the vehicle, turn your heater fan on high, turn your lights on, and have someone check your running voltage under a load. Voltage should not drop below 13.4v. Turn everything off except the car and test it again. Voltage should still be at least 13.4v. If the voltage changes sporadically or drops way down then you probably have bad diodes in the alternator. If the voltage is low at idle but increases with rpms your regulator is probably weak or bad. But the chances of you brake system draining the battery is slim to none.