To answer your question, no...it's not overheating. Is yours?
Yes, if it is leaking and the coolant level is low.
more than likely you have a short in your wiring
try replacing the crankposition sensor my 89 did the same thing and that is what fixed it for me.
if it didnt do it before oil change maybe over full
i have an 89 and mine did the same thing try replacing the crank position sensor.
I just changed a water pump in my '98 jeep that had all the blades rusted off !!! It was "slicing" the water, instead of pumping it.
check the fan not attached to a pully make sure it is plugged in and look if it turns on when the car gets hot. if not then you have a short somewhere.
You will have no problem with that switch over.
To turn the engine over.
If you take out the battery tray and turn it over, you will find the Battery Temperature Sensor. Just found out this was the reason my check engine light stayed on. One of the wires was exposed and discharging to the frame of the jeep.
Easiest way is with an air impact. There are strap clamps available that would go around the harmonic balancer that would hold it while the bolt was tightened.
There is absolutely no advantage of any Cherokee Jeep over any Toyota Highlander. I've had both. The Jeep spent more time in the shop than on the road.