Oh I understand, needs out weight 101 point inspections at times.
If the relay has been replace, then there's no need to jump it. Jumping the relay would only be done to test the relay. New = assumption of working correctly.
I'm no AC system expert, so take my advise as merely suggestions
The switches I mentioned earlier will deactivate the "under hood" ac system, but the blower motor under the dash should still work (would blow warm/hot air). They deactivate to help prevent damage.
The fan not working could disable the system as well (depending on how the system works and what the system monitors). You might get lucky and replacing the fan actually fix the problem, but the main thing the fan does is provide extra cooling for the ac condenser (looks like a small radiator, usually in front of the radiator). Fans being so cheap like you mentioned, replacing it will definitely not hurt anything in the long run.
Sounds like you might need a complete AC system check-up if parts were damaged in an accident (even though some were replaced, others may have also been damaged - switches I was referring to for example).
Simply remove the radiator cap (mid-way in the upper radiator hose, between the radiator and thermostat housing - actually closer to the T-stat). This will allow for a visual inspection of the fluid level within the hose. If you take off the cap see no fluid, the upper hose is empty and there's no need to drain. If there is fluid under the cap, simply drain enough until you don't see any at the cap. Remember to keep the lose hose end up so not to accidentally drain out the fluid. Keep in mind, this isn't radio active, so a little spillage isn't the end of the world. Shop rags and a bucket should be all you need as a safety precaution. The system will be under slight pressure (15 psi is typical), but you shouldn't lose any fluid regardless. And if you do it'll be minimal.
You shouldn't have overheating issue as long as you don't use the AC... as hard as that is in the summer.
What you're attempting is level 0 stuff out of a range of 0-5, 5 being hardest. You can do it!
If the fan change doesn't work, let us know. Might be a wiring issue or something else that got beat-up during the accident.