Question about 1996 Jeep Grand Cherokee

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Electronic display says coolant sensor bad. I replaced the sensor located in the recovery bottle, but it still reads bad?

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Good Evening, I can certainly understand your problem, I fought with a 97 grand cherokee with the same problem, at the end of all the troubleshooting it ended up being the information display module. Certainly it is something to consider, especially changing the sensor a couple times to be sure. Hope this helps, If you have any more questions please feel free to ask.

Posted on Aug 29, 2010

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The coolant sensor is located behind the water gooseneck where the thermostat is ,2 wires with a plug in end. it threads into the intake manifold,unplug the plug unscrew the old one screw in the new one plug the plug into the new sensor , the one you replaced was for the coolant level sensor......

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1. Unplug the sensor harness from the bottom of the coolant bottle.

2. Find a large paper clip and use needle nose plyers to make a "staple" shaped jumper that is about 1/4 inch wide (about the distance between the two contacts on the harness) and about 3/8 inch long.

3. push the jumper you just made into the end of the harness connector.

4. Start your car and ensure that the warning is no longer displaying. You can also insert the jumper while the car is running (be careful, the coolant bottle will be hot) because the harness is removed from the sensor the coolant warning should already be displayed. When you insert the jumper the message should go away imediately. The coolant level sensor has only one job and that is to tell the computer when coolant is low so you don't have to worry that you may be causing any other problems by doing this. If the coolant light doesn't go away you may have a break in the wire somwhere or a bad connection to the jumper.

5. If all works well, use electrical tape to seal up the end of the harness so moisture doesn't get in. Also it's a good idea to secure the harness to something nearby so that it doesn't flop around when you are driving.

All done. Sorry this was long but I hope that it helps someone. That warning really has been irritating me.

Keep in mind that this method does disable a key safety device that is designed (poorly) to warn you in the even of a coolant leak. Keep an eye on your temperature gauge and check your coolant level regularly. Get the bottle replaced when you can.

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