RideDaEJ2

So yeah, i have a 95 civic dx, d15b7, i have had it for about a week and a half. Well lastnight i replaced the blower motor for the a/c, and while i was doing it i had the lights on. Once i replaced the motor i turned the car on to make sure it was working good, it turned on just fine. About 30 min later i needed to go get something at a friends, and when i tried to turn it on the battery was to weak to start it. So i got the jumper and it still wouldnt start it just cranks over but wont start. A friend of mine had a brand new relay so we tried that to see if that was it, but no luck it wasnt. I've heard it might be the ecu but im not sure. All the electrial works headlights cornevers, everything except the hazards dome light, and the intermediate on the winsheild wiper switch.