Thanks for your response. My jack is on loan atm, but I'd the o2 sensor is on that circuit, I need to check down there. The speed bumps where I live are atrocious. It's impossible not to bottom out and I just had to have the pipe welded back together because it had caused it to break the pipe between the cat and the resonator. But there's a better than good chance those wires could be smashed together. And it would explain the inconsistency of the fuse blowing. If I go 15mph over them I feel bad for my suspension but it pushes the car high enough that the exhaust clears. I still believe I've got other wire issues, as the tps seems like it's part of a different circuit but still having issues.