1999 Chevy Camaro Radiator fans

Tiny
JHARRIMAN
  • MEMBER
  • 1999 CHEVROLET CAMARO
  • V8
  • 2WD
  • MANUAL
  • 51,000 MILES
Is it possible for a temp sensor to not kick on the fans yet still operate the temp gauge? I have tested the fan motors, relays, and wring between them. I have a two wire temp sensor.
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Thursday, February 25th, 2010 AT 11:24 AM

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Tiny
CARADIODOC
  • EXPERT
The computer and gauge use separate sensors.

Caradiodoc
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Thursday, February 25th, 2010 AT 11:45 AM
Tiny
JHARRIMAN
  • MEMBER
Where is the other located? I have found the one on the Left forward head, is that the one that turns the fans on through the computer?
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Thursday, February 25th, 2010 AT 12:44 PM
Tiny
CARADIODOC
  • EXPERT
During this time period, GM and Chrysler products, which I'm very familiar with, did things the same way. On the Chryslers, the gauge sending unit has only a single wire. The engine computer's sensor has two wires.

Unplug the sensor you replaced while the engine is running. If the Check Engine light turns on, that's the computer's sensor. If the gauge drops to "cold", it's for the gauge. If both things happen, then indeed the gauge would appear to be getting its information from the engine computer, possibly by way of the body computer.

Again, on Chryslers with electric fans, unplugging the computer's sensor will trigger the computer to turn on the radiator fan and put the ignition system into base timing mode. It does that because it knows it can't believe the sensor information and it will not know if the engine is overheating. Running the fan is a precaution. It will turn the fan off when the sensor is plugged back in. Im not sure if GMs turn the fan on, but it will turn the Check Engine light on.

Caradiodoc
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Friday, February 26th, 2010 AT 12:45 AM

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