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Where is the cooling fan sensor located?

Tiny
JAMCAN1
  • MEMBER
  • 1995 SATURN SC2
  • 4 CYL
  • FWD
  • MANUAL
  • 185,000 MILES
My saturn runs hot whenever the car is sitting still for about 5 minutes or more. The cooling fan comes on only when I turn on the a-c. It does not turn on automatically like it used to. I was told the sensor has gone bad.
Friday, October 7th, 2011 AT 3:19 PM

8 Replies

Tiny
DAN_K
  • MECHANIC
  • 213 POSTS
The coolant temperature sensor is located on the rear of the engine near the coolant outlet.

See attached diagram.
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Friday, October 7th, 2011 AT 4:17 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Just to add to this its the bottom sensor with two wires going to it a yellow wire and black wire. Also inspect the coolant temp sensor connector if the terminals in the connector are green ir blue there corroded and you will have to reolace the connector also. The coolant temp sensors crack and leak coolant into the connector causing the terminals to get corrodedWhat temp on the gauge does the fan come on at?I have seen the fans come on at the tip of the red on those cars from worn temo gauges and bad gauge temp sending units. Which is the top sender with a single green wire.
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Friday, October 7th, 2011 AT 4:27 PM
Tiny
DAN_K
  • MECHANIC
  • 213 POSTS
Thanks for making this much more clearer, saturntech.
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Friday, October 7th, 2011 AT 4:42 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Your welcome always willing to help out the other moderators or the users asking the questions.
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Friday, October 7th, 2011 AT 4:46 PM
Tiny
JAMCAN1
  • MEMBER
  • 12 POSTS
What temp on the gauge does the fan come on? It doesn't come on at all. I have to turn on the a-c in order to get the fan to come on.
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Friday, October 7th, 2011 AT 11:26 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Then replace the bottom coolant temp sensor and inspect the connector too for being corroded.
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Friday, October 7th, 2011 AT 11:36 PM
Tiny
JAMCAN1
  • MEMBER
  • 12 POSTS
Thanx for the info.
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Friday, October 7th, 2011 AT 11:40 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Your welcome keep me posted on how you make out.
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Saturday, October 8th, 2011 AT 6:41 AM

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