How to test Coolant temp gauge out of car

1613 Views 2 Replies 0 Participants Last post by Richelson, Mar 19, 2004

Discussion Starter · Mar 18, 2004

I have my coolant temp gauge o

I have my coolant temp gauge out of my car and the stock sending unit. I put the sending unit in water with a thermometer and connected it to the gauge. It isn't showing a reading. I then put 12V on it and grounded it, still nothing. How do you make it work? Any info would be appreciated.

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Discussion Starter · #2 · Mar 19, 2004

Rich,

If the coolant temp s

Rich,

If the coolant temp sender has just one connnector on it, then it is a variable resistor, with one end tied to ground.

Look at your car's wiring diagram to verify...

Presuming the above scenario is true, then the temperature gauge is simply acting as a voltmeter. So, connect 12V to the "+" terminal on the temp gauge...Connect the "-" terminal from the gauge to the temp sender...And connect the ground from your power supply to the temp sender body. This configuration should produce a gauge reading, once sufficent temperatures are reached.

Regards,
David

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Discussion Starter · #3 · Mar 19, 2004

Got it. Thanks. It is workin

Got it. Thanks. It is working great.

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