2002 Pontiac Montana cooling fans wont engage

Tiny
BAYHORSE
  • MEMBER
  • 2002 PONTIAC MONTANA
  • 3.4L
  • V6
  • FWD
  • AUTOMATIC
02 Pontiac Montana engine cooling fans wont engage with coolant temp. Have had to 206 deg. Wont engage if I disconnect temp. Sensor fans engage. Both fans have voltage but not getting ground. Temp. Guage works and when connected to computer scanner shows temp. Also stays in closed loop from cold to hot.
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Sunday, September 27th, 2015 AT 10:57 AM

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Tiny
HMAC300
  • EXPERT
Check ground at lh rear of engine then check items in pic. It may be that the relays need dielectric grease and tweaking to get correct power to fans. Other wiles have apro scan for code and check ground wire from fans to lh rear of engine. Also check ground to center fan relay in pic. May not be making contact
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Monday, September 28th, 2015 AT 9:43 AM

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