i have an old car that whenever i back out and brake, it makes a loud
noise, but when i brake any other time its fine. any ideas?
and sometimes when i brake to hard or i leave the car idle too long, it turns off by itself.
It sounds like your universal speakers are overloading (or possibly underloading) the brake/idle interface circuit. I suggest asking xand3r, he has the answers for everything... Well nothing really.