Barry Wolk Posted April 22, 2013 Share Posted April 22, 2013 My temperature gauge wasn't working on the pick-up. One of the sending units had a cracked electrical connection, so I replaced it, but the needle didn't move off of cold. Replaced the other and it did the same thing. Hooked up the left bank only and got a reading of just under a quarter on the scale. Hooked up just the right sensor and the gauge reads about five-eights. Since there are two thermostats I suppose there could be that much temperature difference, but how do you explain the needle burying itself all the way to the cold side with both hooked up?Signed,Confused in Farmington HillsAlso, There are two oil pressure sending units available, one an 80 pound and one a 50. My gauge is a 50 pound. Would an 80 pound sending unit bury the needle of a 50 pound gauge? Link to comment Share on other sites More sharing options...
Guest Magoo Posted April 22, 2013 Share Posted April 22, 2013 The unit with one terminal is the coolant sending unit and the two-terminal unit is an on/off, NC switch that opens at high temperature (206 F). Link to comment Share on other sites More sharing options...
Barry Wolk Posted April 22, 2013 Author Share Posted April 22, 2013 (edited) I see. Thank you.Mine came with two single terminal sensors. Edited April 22, 2013 by Barry Wolk (see edit history) Link to comment Share on other sites More sharing options...
Guest Magoo Posted April 24, 2013 Share Posted April 24, 2013 Hope the diagram and info prove useful. Can't see how two sending units in parallel on one meter could ever be accurate since the resistance is halved. Link to comment Share on other sites More sharing options...
Barry Wolk Posted April 26, 2013 Author Share Posted April 26, 2013 The new, two-terminal sensor resolved the problem.A 50 pound oil-pressure sensor took care of that problem, too.Thanks for your help. Link to comment Share on other sites More sharing options...
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