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Tach sensor

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Old Jun 13, 2011 | 12:50 PM
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Israelx7
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Tach sensor

Did my best to discover no tach/shifting problems on here and consensus seems to be...bad sensor=shifting nightmares.
Removed, cleaned, and tried testing sensor by checking resistance per some instructions and discovered a momentary read between leads (less than a second) then reads open circuit.
Since I don't have 60$ (Silver State Ford price) to throw around, just want to make sure dead is dead, and not mostly dead all day.
Is this now officially an "ex"-tach sensor?
I appreciate your input...I'm lost as a goose with diesels.

OK, update...checked AC voltage output from sensor with engine running and DOES increase with RPM's. Any suggestions besides tracing out wires...?
One other bit of info...while tach/shifting was busted and I waited to dunk my boat at the ramp...I switched fuel tanks...and voila! Worked fine till I hauled the boat out, got it home...but when I went next day to check...tach not working, shifting in the toilet. And yes, I did try switching tanks multiple times without aformentioned favorable result. Anything that tank circuit shares with tach circuit? And fuses look OK...
 
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Old Jun 13, 2011 | 11:14 PM
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Double check all your ground locations.
 
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Old Jun 14, 2011 | 04:54 AM
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thanks, will do...
 
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Old Jun 14, 2011 | 05:22 AM
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1994F2507.3L
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i have been told driving with the sensor bad on auto trans will hurt the transmission. someone with an auto trans should confirm.
 
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