hi,
i have a 91 saturn coupe that has been acting weird. When you start it up and try turning on the lights or any power thing on it, it starts to die. And my turn signal lights, light up when i push on the brake. Does anybody have an idea what could be the problem? i already cleaned the ground contacts but i didnt clean the ones on the back of the motor yet.

 

It sounds like you have one (or more) power connections that are going bad.

Charge your battery overnight, to make sure it is fully charged.

Check the battery cables (the big ones) by flexing them -- if they have become brittle internally, replace them. The battery acid will sometimes penetrate under the cable jacket. and begin to destroy the copper cable from the inside, much like termites do to a 2x4 in your house.

Check the various ground connections on the sub-frame of the car to make sure they are tight and making good contact