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Unread 11-07-2008, 12:57 PM   #1
crash9686
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1996 XJ Cherokee 
 
Join Date: Nov 2008
Location: Walled Lake, MI
Posts: 22
'96 Coolant Temperature sender for a '99 4.0

Hello all, this is my first time asking a question and i hope some one will be able to help me. I recently put a '99 4.0 into my '96 XJ every thing changed over just fine except for the coolant temperature sending unit. I know on the pre-'97 4.0's the CTS is in the cylinder head but not on the later models which the gauge info is sent through the BCM. So I'm wondering if anyone knows where the single wire from the back of the head can be moved to so my gauge will work. All suggestions will be greatly appretiated.

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Unread 07-10-2013, 12:26 PM   #2
QuadRaider1
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1996 XJ Cherokee 
 
Join Date: Jul 2013
Location: Oologah, Oklahoma
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I'm in the same boat. My daughter roasted the head in our '96 Cherokee. I found a pristine replacement from a '98 at the salvage yard, but didn't notice it didn't have a tapped hole for the CTS until I'd already installed it on my '96. Looks like I could drill and tap the '98 head, but is there an easier way?
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Unread 07-10-2013, 08:12 PM   #3
djb383
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Copper tubing nipple mounted in the 3/4" heater hose (close) to the t-stat cover with a brass bushing that has the same internal thread as the sending unit and all JBWelded or soldered up. sending unit wire will need to be extended to reach front of motor.



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Unread 07-11-2013, 06:41 AM   #4
QuadRaider1
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That's awesome. Thanks for sharing.
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Unread 07-17-2013, 11:05 AM   #5
QuadRaider1
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1996 XJ Cherokee 
 
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I built the same kind of set up, but I'm still getting the Check Engine light, my temp gauge is still not working and the electric fan is not coming on. Is there another sensor I've missed or a plug I didn't re-attach?
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Unread 07-17-2013, 12:39 PM   #6
gs69350
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Those fittings will need to be grounded to the engine block as well.
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Unread 07-17-2013, 12:41 PM   #7
QuadRaider1
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Ah, I thought that might be the issue. Thanks for all your help.
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