1999 Mazda 626 cooling fans

1999 MAZDA 626
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G.RICHARDSON21
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Engine Cooling problem
1999 Mazda 626 6 cyl Front Wheel Drive Automatic 160k miles

The cooling fans will not come on when required. I know they work because I disconnected them from thier plug-in and connected them directly to the battery. They did run. There must be a sensor that is not working is my guess. The temp gauge does work. Any thoughts on what is going on?
Sep 15, 2010 at 4:42 PM
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BLUELIGHTNIN6
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Hello and thanks for donating


Check your fuses and the cooling fan relay, if they are good than the PCM is probably at fault since it runs the fan, not a sensor.
Sep 15, 2010 at 4:56 PM
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G.RICHARDSON21
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PCM??
Sep 16, 2010 at 1:51 PM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
PCM stands for powertrain control module and acts as the main computer for the vehicle.
Sep 17, 2010 at 12:23 PM
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