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Discussion Starter #1
I have a 2000 XJ and had trouble by shorting out the PCM with the 5 volt supply to the TPS but now only my tach and speedometer works. Even through self diagnostics they stay still whole thw tach and Speedo fluctuate along with the lights. Do i need to replace my cluster or would there be something else causing this? Thanks in advance.
 

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The instrument cluster can develop a bad connection where it plugs in. Clean the contacts, wiggle the plug and it should be OK
 

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I have attempted said fix and nothing. Not even after buying brand new mopar pig tails and putting on the harness did it fix it. And i may need to mention that the PCM was replaced after that shorting.
When i run the self diagnostics test holding the trip all the guages are supposed to move to certain spots throughout the test and both 2 on each side stay still pointing straight up and only the tech and Speedo move when they are supposed to move to certain spots as well. You helped me on my last post too i appreciate it!!
 
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