Low Coolant Sensor Help.

billison

I like tinted tail
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Feb 27, 2006
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ok, I picked up a overflow with low coolant light for my 88 gt. My original set up was replaced with a jug zip tied in the fender ( classy), so I'd like to restore it to a proper set up.

So I found a original overflow with sensor. I've confirmed that the light works from jumping the connector. I can't however get the sensor to turn on the light. I've cleaned the connection, cleaned everything I can think of. Using my meter, with the harness in, I've checked for power while moving the float- nothing, I've checked to continuity - nothing.. I'm not sure what to check before I return this.

To be clear, the 87-89 is different than the 90-93.
 
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Mustang5L5

A little massaging and it went right in
Mod Dude
Feb 18, 2001
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If you have 0 continuity in both extremes of the switch's movement, I would suspect the float is bad
 

billison

I like tinted tail
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Feb 27, 2006
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I honestly can't even figure out how the thing works. I'm honestly thinking I'll just try to get a refund and get a new unit.
 

Mustang5L5

A little massaging and it went right in
Mod Dude
Feb 18, 2001
32,481
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Massachusetts
Pics of unit?


Where did you get it from? I've been looking for one for the same reasons
 

billison

I like tinted tail
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Feb 27, 2006
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I'll snap some tonight. I found a guy who deals in second hand parts.
 

84Ttop

They make new pistons every day, so why worry?
Mod Dude
Jul 2, 2009
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The float switch simply makes or breaks a set of contacts, if you can't get continuity through the float in either position it is Kaput (technical term)
 

billison

I like tinted tail
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Feb 27, 2006
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That's where I get confused. There is nothing inside the cap that connects.. Almost like its magnetic or something.