1991 Chevy S-10 Temp gauge erratic

1991 CHEVROLET S-10
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TERRYD50
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Electrical problem
1991 Chevy S-10 6 cyl Two Wheel Drive Automatic

I have 1991 checvy s10 v6 truck with analog instrument panel. The temp gauge jumps all the way to max and back down (fluxuates) and sometimes stays locked in high temp setting the check gauges light. I have replaced all temp sender and sensors with no cure. I pulled the sender to temp gauge connector but get he same intermittent issue. I was only come to a result of temp gauge drivers or temp gauge. Other gauges are fine. What is the path I should take? Will happy to contribute and pass to other people if I get results !
Jul 25, 2010 at 6:54 PM
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RASMATAZ
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Check and test the engine temperature sending unit/switch and the wiring
Jul 26, 2010 at 5:51 AM
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TERRYD50
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I said I already replaced these - sender and temp switch! Please read my first post again! Thanks
Jul 28, 2010 at 11:41 AM
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RASMATAZ
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If you tested the wiring too and it contimues to do that-you engine temperature gauge could be a voltage problem or out of calibration
Jul 28, 2010 at 3:27 PM
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TERRYD50
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I checked the wiring to the firewall, I have not checked it to the instrument panel. This is a analog gauge not digital. There are electronic drivers to drive all analog gauges but I find it funny that if I remove the temperature switch the temp gauge still bounces up and down when I hit bumps in the road. The gage should not do anything based on the factory manual. Have you ever heard of this intermittent issue?
Jul 29, 2010 at 11:39 AM
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PAPAROACH
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replace the gauge
Aug 11, 2010 at 3:08 PM