Water temp gauge

Tiny
MARCBEE
  • MEMBER
  • JEEP WRANGLER
I have a 1989 Jeep Wrangler Sahara, 6 cylinder 4.2L, 5 speed with 116,000 miles. When cold from sitting and I begin driving, my temp gauge would go up a little bit then jump all the way to the right maxed out. I replaced the sensor at the rear drivers side of engine. Now it goes from cold all the way to maximum hot as soon as the engine begins to warm. I have no overheating problem. I've driven the car 50 miles at a time many times with no problem.

How can I test the temp gauge to make sure it is or is not broken? The dealer says they don't have new ones available any longer.
Any ideas?

Thank you for your help
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Wednesday, November 14th, 2007 AT 6:33 PM

2 Replies

Tiny
FISHERMAN
  • MEMBER
Hello !

Well looks like you have a grounded temperature signal wire. Follow that wire all the way it the the inner wire could be expose and "touching" ground.
Let us know how are you doing.

Good Luck!
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Wednesday, November 14th, 2007 AT 8:59 PM
Tiny
FISHERMAN
  • MEMBER
Hello Again..
I was checking the schematic and I was right.. thats just one wire that sends the signal to the gauge.. follow it and be sure that its insulated..
here part of the wire diagram:

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http://www.2carpros.com/forum/automotive_pictures/576_Jeep_Sahara_89_1.jpg



Good Luck!
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Wednesday, November 14th, 2007 AT 9:10 PM

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