Adapting 81+ Temp Sensor to 79 Gauge? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Adapting 81+ Temp Sensor to 79 Gauge?

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Jeep Fog Light LED Bulbs! Several Brightness Options! Clayton Off Road JK Short Arm Suspension Kits

Reply
Unread 08-14-2009, 03:00 PM   #1
attworth
Registered User
1979 CJ7 
 
Join Date: Jun 2009
Location: West of Topeka, KS
Posts: 397
Adapting 81+ Temp Sensor to 79 Gauge?

I'm using 81+ exhaust and intake manifolds on my 79 258. The later ones are coolant heated. I'm wondering how to run the coolant temp sensor. Here's a picture.



It has two wires, whereas the original sensor for the motor had a single wire. Unless this isn't what I think it is - in which case, what is it?

There is another fitting that looks similar to my original temp sensor which is on the back of the intake.

Thanks!

attworth is offline   Reply With Quote
Unread 08-14-2009, 03:15 PM   #2
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 12,307
Why aren't you using the original temp sensor?

You shouldn't have to change a thing in regards to the temp sensor just because the newer manifolds are used.

The switch in your picture is the one that is used by the computer to tell the computer controlled BBD carb to go to closed loop. It isn't used for the temp gauge.
http://home.sprynet.com/~dale02/coolant.htm


The other sensor you're seeing is probably the one that controls the electric manifold heater.

http://home.sprynet.com/~dale02/manifold.htm
CSP is offline   Reply With Quote
Unread 08-14-2009, 03:21 PM   #3
xeroOTG
Registered User
1998 XJ Cherokee 
 
Join Date: Nov 2008
Location: Las Cruces, NM
Posts: 187
If its a temp sensor, one is a ground, the other signal. On GM style sensors, yellow is signal, black is ground. It does look like a temp sensor to me, but im not 100%.
__________________
My jeep gives a whole new meaning to the phrase, Just Empties Every Pocket!

1975 Jeep CJ5 258 TBI EFI, T-18, D-20, D44 rear, 4.11.
1992 Jeep Cherokee 4.0L, AW4, NP231 October 2009 - August 2012
1998 Jeep Cherokee 4.0L, AX15, NP231 - August 2012
xeroOTG is offline   Reply With Quote
Unread 08-14-2009, 04:23 PM   #4
OMR
Registered User
1986 CJ7 
 
Join Date: Mar 2008
Location: Nor-Cal
Posts: 108
The temp sensor for the gauge is on the back corner (drivers side) of the head.

The other two sensors are as CSP said -
__________________
Mark

'86 CJ7 - 258 - Howell - 'Rushed' - 2.5" sl, 1" bl - T5 - d44 rear - 33 x 12.5
OMR is offline   Reply With Quote
Unread 08-14-2009, 04:47 PM   #5
attworth
Registered User
1979 CJ7 
 
Join Date: Jun 2009
Location: West of Topeka, KS
Posts: 397
Thank you, that's kind of what I was thinking but wanted to make sure.
attworth is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.