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Old 07-14-2007, 03:48 AM   #1
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help......my gas guage stays ay fulll at all times...now my temp guage stays at cold and my rpm is not moving and the battery gauge seems to go up and down.... oill gauge seems to flucuate...up and down ..........whats up...? this is a 2005 car
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Old 07-14-2007, 10:29 AM   #2
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Default Re: guages all messed up

This sure sounds familiar. Schematics of the data bus are in this thread.

http://www.bonnevilleclub.com/forum/...ic.php?t=79945

Wish I had a resolution to offer.
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Old 07-14-2007, 11:53 AM   #3
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Is your car still under warranty? If so, have the dealer track down the problem. Some have had problems start to develop with the dash, requiring replacement.
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Old 07-14-2007, 02:57 PM   #4
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Default guages not working

thanks ...no the car is no longer under warranty...ran out at 36,000 miles..im at 38 now.... i read something about resetting the panel...how is that done? probably a new cluster panel right....but my speedometer works......bummer...thanks...all information is greatly appreciated...will this affect the performance on the car ?till i can have it fixed?
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Old 07-14-2007, 05:47 PM   #5
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The main concern about driving it the way that it is, is that you will have no warning if something serious (overheating, drop of oil pressure, etc.) does happen. There are a few things you can try yourself, if you have some basic tools, before sending it in for repair.

Start with cleaning all of the battery and ground connections that you can find. Pay particular attention to the bolt that holds down the negative battery cable to the floor pan under the seat. Remove that, and clean up the bolt and threads in the floor the best that you can. Apply some dielectric grease before attaching them again. Do the same for the positive connection at the rear fuse block, as well as under the hood. Then, see if the 3 little bolts in the underhood fuse block are good and snug, and check the connection to the alternator.

If those things do not solve your problem, measure the voltage across the battery terminals with the engine running. Is it a relatively stable reading, or does it fluctuate like the dash reading. If so, it'* possible that you have a faulty alternator.
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Old 07-16-2007, 09:29 PM   #6
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I have also heard that the ignition switch (not the tumbler) can cause similar problems. Some of the Grand Prixs had this issue.
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Old 07-17-2007, 01:57 AM   #7
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Default guages all messed up

yesterday Sunday i took a cruise in the car...all guages worked fine but the gas guage...but today again the only ones that worked was the oil..temp and battery...no rpms.......why ? works one day then not the other....HEAT MAYBE?
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