1997 Oldsmobile Aurora cooling fan problems engine overheats

Tiny
STEETOR
  • 1997 OLDSMOBILE AURORA

Engine Cooling problem
1997 Oldsmobile Aurora V8 Front Wheel Drive Automatic 127000 miles

The engine cooling fans only start when the AC is on, the temperature gauge reaches normal temperature and beyond into the hot range.

It has reached 240, then I turn on the AC so fans turn on. Shouldn't fans turn on about 220? Is it a relay problem? Where is high speed relay located?

There are 2 fans. Both turn-on when AC is engaged. The temp gauge shows temp increase, so temp probe seems OKay. Where is temp sensor located? Where are cooling fans relays located?

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Monday, November 1st, 2010 AT 1:35 PM

1 Reply

Tiny
2CARPROS KEN
  • ADMIN
  • 4,348 POSTS

Hey Steetor,

I have gathered these guides for you to start checking things. This guide shows both the temperature sensor location and the fan relays. The BCM send the signal to the relays so if all else fails the BCM is bad but check the wiring diagrams first to be sure.

The fan relay locations are in the diagram. You might have to use an infrared non-contact thermometer to see if engine temp and gauge show about the same to make sure of the engine's temperature.

https://www.2carpros.com/articles/how-to-use-an-infrared-temperature-meter

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please let us know what you find so it will help others.

Best, Ken

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Tuesday, December 6th, 2016 AT 8:54 PM

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