View single post by John Kimbrough
 Posted: 10-22-2006 02:30 pm
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John Kimbrough

 

Joined: 03-12-2005
Location: Washington USA
Posts: 116
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 For several months now, my temperature guage has been reading very low (it seems) and now it is not reading at all.  My gas guage seems to be working fine, so I don't believe it is the regulator.  Suspect is the temperature transmitter.  Since there is but a single connection on the transmitter, I assume it must be grounded through the engine.  If so, if the connection between the transmitter body and engine is not good (like the thread sealant is insulating it) then the guage would not work. 

Has anyone measured the resistance across the transmitter to see how it changes during engine heat-up?  Mark, I seem to remember you doing this in another life.  I would be interested in checking out the whole circuit using a variable resistor in place of the transmitter if I knew the range of the transmitter resistance.  That way I could isolate the problem. 

Also, does anyone know of a transmitter that has both a guage and a ground connection so I can take an iffy ground out of the mix? 

Any thoughts???  John.