97 seville sls battery keeps going down
 

i have a 97 sls and i have to keep getting the battery charged up every 2 or 3 days in order to try and start it. already replace the fuel pump. also, cannot get the headlights to work. have already changed headlight relays twice. the headlights never do come on, but did have parking side lights on and the blinkers work (fast blink). has anybody had the same problems....stuck on what to do next without taking it to a dealer where they will charge an arm and a leg to figure it out. looking for answers if you got them...thanks

kadillac1