no power at all

ok, car was running fine all ady. then I go to start it, and I have a security light bar that I leave on, got in the car, it was on, go to start the car and it trys to kick over once, then everything dies. now I turn the key and nothing, no click, no lights, no anything. checked the battery and seems to be fine, but im replacing it tomorrow anyway. checked all fuses it might be they were fine. went to check the main fuse under the hood and accedentally broke it pulling it out, but it was fine other than that. what else could I be missing. fuses battery all were fine. any...I mean ANY advice would help, even if all you do is tell me to check the fuses again, which im going to do in the morning when there is light out. I NEED HELP.

problem fixed....it was the negative wire from the cable. it wasnt grounded to the car, too much corrosion.

problem fixed....it was the negative wire from the cable. it wasnt grounded to the car, too much corrosion.

Funny timing. I just fixed this on my '87 yesterday.
Replaced the Altenator and plugs lasdt week