Question about 2000 Ford Taurus

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Tach drops to o and bounces while driving only to return to normal after a few miles and car runs fine

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Check Connection @ Ign. Modual and ESC FORD has a BAD Rep for POOR Electrical Connections

Posted on Sep 07, 2009

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It would appear you have an electrical connection that opens from time to time. When this opens the tach. no longer receives the signal from the engine sensors indicating your engine speed (RPMs) Ford might have used a seperate sensor to develope the pulse to the tach too, possible but I doubt. An area where electronics do and have failed is the main PIN connection to the back of your instrument cluster. As the government has pushed us into little ot no use of lead this has impacted our electronics too as the solder connections are more brittle and crack. Depending on your skill level you may be able to remove the instrument cluster and check the back of the primary PIN location carefully check all of the contacts for cracks, if you see one cracked you may use a small solder iron to rehat and repair; look carefully for a small black line around the solder joint, that may be a crack (I had to do this with my wife's mini-van)
I hope this may have helped,
Tom

Posted on Sep 07, 2009

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I presume that isn't a mechanical tach. you either have a failed relay for the tach or a loose connection. the relay is likely in the fuse box located in the engine compartment near the battery.


robert

Posted on Sep 07, 2009

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