OK, so DON'T unhook the battery - I guess I'm too old-school. This would be fine for a car before 1980ish...

In the 1970s, removing a battery terminal was an accepted practice to test charging systems of that era. That is not the case today. Just say NO if anyone suggests this. ( http://www.pacificpowerbatteries.com/aboutbatts/Car%20Battery%20FAQ/carfaq14.html )

2001 Montero XLS. Needs some TLC.
My B**ch ex-wife really treated this vehicle badly. Been fixing it up since I had to take possesion after the divorce.