cooling fans

1998 PONTIAC GRAND PRIX
170,000 MILES
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CHARLIE1229
  • MEMBER
  • 46 POSTS
i have a 98 grand prix and the cooling fans only comes on with the AC and not when the engine temp reaches above 230f. i have changed the coolant temp sensor and now i do not know what it could be. any help?
Dec 21, 2011 at 6:59 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Could be the fan relay or the computer is not getting the input signal from the CTS therefore not activating the fan relay-
Dec 21, 2011 at 7:06 PM
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CHARLIE1229
  • MEMBER
  • 46 POSTS
i checked the relays and they work. is there a way to check the signal from the CTS?
Dec 21, 2011 at 7:20 PM
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