2001 GT Headlight Problems

I just bought a 2001 Celica GT and it appears it has some sort of issue with the headlights. I have disabled the DRL using the instructions from the forum. When I turn the headlights on my rear lights, running lights and a small light in the headlight housing come on but the low beams do not come and the fog lights don't work. When I turn the high beams on both the high and low beams come on and the fog lights work but when I turn the high beams off the low beams, running lights and rear lights all stay on, the only way to get them to shut off is to disconnect the battery for a second and reconnect. Does anyone have any idea what is happening or any ideas on how to fix it. Any help would be appreciated. Thanks.