Your post is a bit hard to understand, but it sounds like at some points you're getting a significant vibration or "hop" when you have the A/C on?

Maybe your compressor is seizing and what you're felling is the belt jamming up or "surging"? I'd check your belts and pulleys. The higher temps may mean something going on with the water pump.

I don't know about the fuses. You'd have to check what's on that circuit.