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1990 Other Nissan Models rad fan not turning on when hot

Tiny
FIREFOX16
  • MEMBER
  • 1990 NISSAN
Engine Cooling problem
1990 Other Nissan Models Two Wheel Drive Automatic 195000 miles

hi, my rad fan doesnt want to turn on when its hot.
but its working. I wonder what the problem is.
also, it doesnt want to idle when its in drive gear
why is that?
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Monday, February 25th, 2008 AT 1:57 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the temperature switch/fan relay-for the idle problem-check the auxilliary air control valve and throttle switch/throttle position sensor.
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Monday, February 25th, 2008 AT 2:01 PM
Tiny
FIREFOX16
  • MEMBER
  • 2 POSTS
I remove the relay and hard wired it and the fans worked,
what would the problem be now? Is it the censor?
How do u check the censor for the fan?
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Monday, February 25th, 2008 AT 2:06 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Measure its resistances hot and cold-if okay you have a wire problem to the computer it depends how its wired into the system
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Monday, February 25th, 2008 AT 5:20 PM

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