Originally Posted by Nick2
I haven't had a chance to deal with it yet and to be honest, I am having a hard time finding the harness online. Might have to bite the bullet and go to the dealer. It's definitely not the battery, I had it tested and recharged, and it is a less than two year old Interstate MegaTron II battery. I have tested the battery and am getting 12.6 across the terminals after having it charged. i haven't manually jumped out the starter and I am hoping the battery cable is the problem. It does seem corroded inside. the wire itself is whitish and kind of chalky.
If you have a bad cell, you can measure 12V when there's no load. Then when you put a load on the battery, it drops. This is what happened to my wife's Cavalier.
When you say "tested" what type of testing? Did you take it to an auto parts store and have them test it? Or did you simply measure the voltage? When they test it, they will test it under a load. But if you just checked the voltage, that's not really testing.
Have you tried jumping the battery w/ another car? If you can jump the car, it's not the harness and most likely the battery.
You can also take a DMM and measure the resistance from the battery terminal (w/ wires connected) to either the starter solinoid/body (depending on which wire has the corrosion). This will tell you if you're getting a solid connection with the wire.