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Cooling fans not working

Tiny
JAKE WOLOSONOWICH
  • MEMBER
  • 1996 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 230,000 MILES
Now the cooling fan are not working and I unplugged the temperature sensor and they work properly. And don't overheat but when I plug it in the fans go off and overheats. Water pump new, thermostat new, temperature sensor is new. What could be the problem?
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Friday, August 30th, 2019 AT 7:00 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

I would replace the Engine Coolant Temperature sensor (ECT). In the diagrams down below I have included a wiring diagram of your vehicle's cooling fan circuit. Both of the wires that come from the ECT go directly to the PCM. So there is either a short in the ECT or the PCM has gone bad, but I'm pretty sure it's a bad ECT. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Saturday, August 31st, 2019 AT 9:25 PM

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