Chevrolet: Cavilier possessed?, battery cables, chevy cav

Question
Hey Roger, my 2000 chevy Cav is acting weird after i installed a new battery. the lights flicker on and off and the clock resets whenever i'm braking or using the turn signal. with my old battery my friend said that there was internal leakage within the battery so there could be no corrsion to the tubes in the engine. Please help me I love my cav and have no money to bring it to a dealership garage!!

Answer
HI Melissa;
           Who put the battery in, it sounds as if the batty  term. might have crossed and shorted something in the computor , i really work on the 1955 thru 75 cars but i think you have a computor  error that must be re-set, but first try to take off one of the battery cables and do not let it touch anything keep it off for a hour or so and see if the condition goes away or drains out, etc. than replace the cable and see what it does OK.