My ECT sensor in my 1988 Jeep Cherokee has nothing plugged into it. I tried to look for the wire that is supposed to connect to it but I could find it. It might be that the wire doesn’t exist or that I can’t find it. Can anyone help me find where the wire is to plug it in or where I could buy a new wire/ harness and how to install it?

thanks

 

That's a thermostat housing from a later 4.0, with the sensor used as a plug.
disregard it.

 

my model is the 4.0 but your saying that the ect sensor is just a part from a later model. So does the 88 4.0 have an ect somewhere else?

 

Yes. 91 and later. You have a coolant temp sensor down low on the driver's side of the block. and a temp gauge sender way back on the driver's side of the head close to the valve cover.