temp sending unit

210,000 MILES • 4 CYL • 2WD • MANUAL
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MANICMECHANIK
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enter your question i have a 1994 saturn , having issues with cooling fan not coming on . The manual says to check the temp sending unit. It also mentions " pigtails " what are they referring to ?
Jan 12, 2011 at 10:43 AM
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SATURNTECH9
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There talking about the coolant temp sensor and the connector to it.Does your a/c work if so turn on the a/c let me know if the radiator cooling fan come's on with it.
Jan 2, 2020 at 11:58 AM
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MANICMECHANIK
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yes it comes on when i turn on the A/C. thanks
Jan 2, 2020 at 11:58 AM
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SATURNTECH9
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Alright then i would replace the coolant temp sensor the bottom one with two wire's going to it.it has a yellow wire and a black wire going to it.It's screwed into the head right below where the upper radiator hose goes onto the head.Also inspect the connector going to it if it's corroded then you have to replace the connector too.It's real common for them to go bad.let me know how it goes.
Jan 2, 2020 at 11:58 AM
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MANICMECHANIK
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thank you for your time and help , hopefully this is all it is just called the auto store and they have it in stock for $8.99. I will let you know how it goes.
Jan 2, 2020 at 11:59 AM
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SATURNTECH9
  • ✓Experienced Mechanic
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After you replace the sensor let it warm up and watch the temp gauge the fan should come on at about 3/4 on the gauge.Also inspect the connector going to it make sure it's not corroded.Let me know what you find.
Jan 2, 2020 at 11:59 AM
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