1991 Chevy S-10 Temp gauge erratic

TERRYD50

MEMBER
1991 CHEVROLET S-10

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 !

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Check and test the engine temperature sending unit/switch and the wiring

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Monday, July 26th, 2010 AT 5:51 AM

TERRYD50

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4 POSTS

I said I already replaced these - sender and temp switch! Please read my first post again! Thanks

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Wednesday, July 28th, 2010 AT 11:41 AM

RASMATAZ

MECHANIC
75,992 POSTS

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

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Wednesday, July 28th, 2010 AT 3:27 PM

TERRYD50

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4 POSTS

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?

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Thursday, July 29th, 2010 AT 11:39 AM

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