EJ1freak911

ok here is my deal i just replaced the battery and altnator in my 95 ex. stock motor etc. well when i try and start the car i get nothing. i turn the key all the way over i get dash lights but when i turn the headlights on nothing works. if i jump the car it will run i drove it around for about 10 min but when i turn the headlights on the car wants to die. some sort of short? or some thing grounded out? its like t=its not getting enough juice to start