1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Number 2 Water Temp Switch (Rad)

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Old Apr 18, 2010 | 05:08 PM
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From: Huntsville AL
Number 2 Water Temp Switch (Rad)

So I am looking in the FSM and I have the number 2 water temp switch plug. I can't
find the plug anywhere on the radiator. The only wire from the radiator is on the top
censor, which I believe is the low coolant sensor. I know one of the water switches
fell off, the one on the back of the water pump housing.

Blue with black stripe, and a blue with yellow stripe wire.

#b11

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Old Apr 19, 2010 | 11:59 AM
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From: Huntsville AL
Bump!
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Old Apr 19, 2010 | 12:21 PM
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From: Lake Wylie, N.C.
The sensor on an SA radiator is on the drivers side upper, right under the
radiator fill. On an FB its on the drivers side lower, at the very bottom of the
radiator. Both sensors thread in horizontally and stick out of the radiator on
the fan side.

Either way these are just for the cold start assist which I'm sure your
not using anymore.
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Old Apr 19, 2010 | 01:28 PM
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From: https://www2.mazda.com/en/100th/
the EFI cars use this switch to "turn on" the emissions system.
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