won't turn over

When cold below 50'F it wont even try to start i hear a click and thats it. If i plug it in it will start sometimes. If i cross starter bolts it will start sometimes. Any Ideas? Im dyin here. :dunno:

I read the threads below, but none seemed to compare.... A month or so ago, I started my truck and waited for the WTS light to go off, and then started it, it seemed to take longer than usually to turn over, it happened for a few days then went away. It started back day before yesterday and...