Starter Issue
First you'll want to disconnect your battery and then get under the car to take a look. One of the wires is hot all the time and goes directly to the battery. (This is why it's so important to unhook the battery - you don't want the starter engaging while you are under the car if the wires touch.)
The large hot wire should have a tab on the ring terminal that sits in a plastic notch that helps keep it in the right orientation. The other wire is connected to your starter circuit and is what engergizes the starter. It should be attached firmly and if the battery wire is in it's proper spot/orientation, the two should not be able to touch. (If they do, the solenoid and starter will activate, even if the ignition system is not active.)
Maybe the two are close together and they are only touching under certain circumstances?


