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part identification

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phordnut View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote phordnut Quote  Post ReplyReply Direct Link To This Post Topic: part identification
    Posted: 14-December-2018 at 10:55AM
Is this a temperature sensor? Theres one inside the air cleaner assembly and then this one in front of the radiator. I never paid much attention to it before but when I was reinstalling the wiring harness for the lights I decided to find out for certain. It had a black coating on the disc (paint?) that was mostly worn off.

Allen
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californiajohnny View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 14-December-2018 at 11:46AM
it's some kind of ambient air temp sensor has to do with A/C cars, exactly what it does IDK?
JOHN
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aquartlow View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote aquartlow Quote  Post ReplyReply Direct Link To This Post Posted: 14-December-2018 at 1:06PM
Originally posted by californiajohnny californiajohnny wrote:

it's some kind of ambient air temp sensor has to do with A/C cars, exactly what it does IDK?
 
John,
 You nailed it, it is an ambient temperature sensor for the A/C system. Basically when you place the HVAC control panel to turn on A/C, it passes the 12v signal to the A/C compressors clutch to engage it when ambient temps are above 50' F (IIRC), below that temp the sensor will not pass 12V on to the compressor clutch due to system freeze-up issues. When the sensor goes bad it usually ends up in the open position, so no 12V signal passes through it. 


Edited by aquartlow - 14-December-2018 at 1:09PM
www.supermotors.net/22468
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phordnut View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote phordnut Quote  Post ReplyReply Direct Link To This Post Posted: 14-December-2018 at 1:36PM
Thanks. Never had a clue what it did. Now after 36 years I know.

Allen
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