Question about 1999 Jeep Grand Cherokee

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I have a 1999 jeep grand Cherokee Laredo that just shuts off while driving. I took it to a mechanic and he replaced the PCM and I also changed out the Crankshaft Position Sensor. Now the Mechanic is telling me it is the Wiring Harness. Any help would be much appreciated because I do not have another 2700 dollars for a new wiring harness

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Sounds like you have a "parts replacer" not a technician. What kind of testing was done? Or. is he just guessing and charging you for that? What's wrong with the harness that was not wrong since "99? Unless it was crushed or cut or burned, the only problem with a harness generally is that where each wire enters the pin at it's end, sometimes that connection will deteriorate, and the pin will show no voltage. It may be time consuming to find the pin(s) but knowing the symptoms eliminate a lot of them.
When found, usually the connection can easily be restored or pin can be changed. I don't enjoy that work but have done it many times, always with good results.

Posted on Jul 28, 2009

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While hanging your head out the window, try turning your ignition to the on possition but do not start the vehicle, and listen carefully for a brief whinning noise. Hopefully you heard it, if not, your fuel pump might be slowly dieing. Your mechanic can do a fuel pump pressure test, if he hasn't already that is.

Posted on Jul 28, 2009

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