the wires and connectors seemed fine. they didn't look scorched at all, and there was no melted insulation.

The driver's side fan spins freely.

The passenger side fan does not. It's catching on something, either a blade catching on the shroud or broken motor parts.

Is a fan replacement something I can do myself in my apartment parking lot with simple tools?

(full socket set, metric wrenches, screwdrivers of varying sizes, pliers)