You responded to my posting about my Cherokee running hot...

Model years vary in their handling of sensors, e-fan management, etc. etc. !?!?

The sender for the temp gauge (in rear of head) has no effect on check engine light or TPS or anything else but the gauge.

Does the e-fan come on with the A/C or when you unplug the temp sensor in the thermostat housing?

I know the temp sensor is not supposed to do anything but send signal to the gauge, but the wire from the sending unit is the same purple/white as the TPS and MAP. Once I changed the sending unit the check engine light stayed off.

Should the e-fan come on when I pull the connector from the thermostat housing regardless of temp? Same with A/C?