I have an 02 and i been having electrical problems what can i do?

make sure the new battery is not bad, i paid $350 at a cad dealer to try to fix my car before i went and got it and towed it home, because they were going to start replacing different parts , (first part was the idle control .which i had kept unplugged), I ended up figuring out, the few month old battery, was bad, it had multiple codes thrown and ran bad.

All electrical problems are a rust connector or a bad ground . Rendezvous, After three B.C.M., I found the problem under hood,their is five ground wires where the tran and engine meet, this could fix a dozen or so elect. Problems give it a try. No cost, just labor, God bless you work !