What will cause the rpm. And oddmetter and speed not to work and my dash borad trun on and off

Alex Lucio

Asked by Alex Oct 30, 2013 at 02:15 PM about the 1998 Buick Regal 4 Dr GS Supercharged Sedan

Question type: Maintenance & Repair

2 Answers

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...yes, easy one...the chassis ground is not making enough of a connection to supply grounding to the dash....you must disassemble the main ground connection (battery to frame) the frame needs to be wirebrushed clean with a coarse wirebrush and the lug too....little known fact, everytime you start the car there are bits of the lug and bits of the frame exchange particles in a firey connection....this corrodes the connection...as you will see when you disassemble this connection to clean it~....also if the battery is older than five will need replacement....these new tin/antimony alloy batteries (no lead anymore) will stop accepting a charge ten percent per year....so get a NEW one~

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Leo Velez

something similar happened to me a few years ago. My alternator was about to croak, and those symptoms were persistent until if finally went on to the other side. I hope this helps.

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