AT Thermo Switch
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I think that was a cone..
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Joined: Apr 2012
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From: Mountain View, CA
AT Thermo Switch
Can someone post a picture of the actual AT thermoswitch connecter. I have an unconnected blue connector in my engine bay right be the back of the thermostat housing. The car runs just fine and I can't figure out what it is. So I am thinking the AT thermo switch and maybe a previous owner used the AT harness in my car.
Cali EGR.... NVM
Cali EGR.... NVM
Last edited by Element85; May 25, 2012 at 01:47 PM. Reason: More Searching Found Answer
Recovering Miataholic
Joined: Mar 2002
Posts: 1,561
Likes: 50
From: Fountain Valley, CA
Here is a pic of the two coolant sensors at the rear of our '94's thermostat housing. If "AT" stands for "ambient temperature," neither of these sensors is that. A floating blue connector in that general area could be a disconnected EGR function sensor. On a CA car with stock PCME, that should cause a stored fault code.
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