What coolant temp sensor is this?

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Oct 14, 2021 | 02:37 AM

#16

SilverfoxXJ

Junior Member

Joined: Aug 2019

Posts: 63

Likes: 2

From: Brisbane

Year: 1995

Model: Cherokee (XJ)

Engine: l6

Better late than never

Quote:

Originally Posted by 4x4utahcherokee

Thats kinda what I figured but I'm not 100% sure if the one in the t-stat housing is the cheaper one. I know when I unplug it my gauge doesn't work but my theory on which one controls which is just something i heard through the grapevine. no facts to back it up. Thats why I'm asking on here before I buy the wrong one. In my 90 xj i never had problems with sensors and it seems like I've had nothing but problems with my sensors in my 97.

I realise this is a very old thread but what I found is the one on the back of the head (on manifold side) is the Guage sender, it is also physically smaller and it has only a single pin socket
On the thermostat housing temp senders have two wires as they send data to the computer BUT they do have two different design sockets and if you do not check by seeing if your new
sender will accept the harness plug you will have to track down the correct one!! Not sure when they changed the socket and plug on the harness ,possibly 1996 on? If you screw in your
new sender into the thermostat housing and leave spanner marks on the brass hex your supplier may not accept it back? Do not ask how I know all this!!
Hope this helps some newbie out there !

Feb 19, 2023 | 01:48 AM

#17

CJ Settle

Newbie

Joined: Feb 2023

Posts: 1

Likes: 0

if my e fan is straight wired does

Quote:

Originally Posted by 1991Jeep_Man

yes, that is your Coolant Temperature Sensor. It controls your e-fan, basically anything controlled by the ECU based on temp. The Coolant Temperature Sending Unit is the one on the back of the cylinder head; it is smaller but same shape as the CTS

my e-fan is straight wired, does that mean i could put a aftermarket sensor there? and leave that unplugged