i have a 1993 mustang lx 5.0, lately when i go to turn it on i hear a click and all the electric to the car dies. i have amps and subs in the car and i thought that was the problem so i disconnected them, the same thing happens. i changed the ignition relay and it still happens. i cleaned the terminals and ground and that didn't help. if you are facing the motor the click comes from the right side, it sounds like its coming from the ignition relay. if i go and jiggle the positive wire that goes to the battery after a few times it starts. i'm new to the mustang community so any help is greatly appreciated,

thanks,
Brian

 

battery ?