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Cooling fans

Tiny
CARFOOL
  • MEMBER
  • 1996 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 162 MILES
Put new temp sending cener in fans wont work. Unplug the cener and both fans turn on. Is there another cener?
Thursday, April 14th, 2011 AT 6:24 PM

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the temp gage showing, in degrees? Is it overheating? Low speed fan won't come on till about 220.

Some systems, the fan will run if you unplug the cts. It also may turn on when ac is on. Any applicable trouble codes?
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Tuesday, April 6th, 2021 AT 7:55 PM
Tiny
CARFOOL
  • MEMBER
  • 3 POSTS
The gage only gose to 220 it is at 220still dont turn on
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Tuesday, April 6th, 2021 AT 7:55 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If it overheats, it will pop the radiator cap, where applicable, and the reservoir will fill up in a hurry. I looked at your owners manual, the temp gage goes to 260 degrees F. Give me a minute to look around.
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Tuesday, April 6th, 2021 AT 7:55 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any applicable trouble codes?

In the diagram, the black wire at motors 1 and 2 are grounds. Fan 1, lite blue wire is voltage. Fan two, white wire is voltage. The ground for the coil side of relay/s is controlled by pcm. No ground, the relay won't energize.
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Tuesday, April 6th, 2021 AT 7:55 PM

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