No high speed fan when air conditioning is turned on?

Tiny
AMOS1!
  • MEMBER
  • 2010 CHRYSLER TOWN AND COUNTRY
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 83,000 MILES
Replace hi speed fan relay check fan checked pressures ohmed out wires to tipm. I get 14v on relay coil when air is turned on but it appears there is no gnd or what ever from the tipm. I have replaced the tipm with a rebuilt on still same problem.
Saturday, April 18th, 2026 AT 11:52 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,469 POSTS
So, I would check the dark blue wire for 12 volts at the blower control module when the key and HVAC system are on. Then check the black wire for ground with the control module unplugged. If these tests are good replace the blower control module here is the location of the module and the wiring diagrams for the blower motor so you can see how the system works. Check out the images (below). Please let us know what happens.
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Sunday, April 19th, 2026 AT 8:43 AM
Tiny
AMOS1!
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Thanks for that but I was referring to the high speed radiator fan. I was under the impression that as soon as the air conditioning was turned on that the radiator fan motor would go to high speed.
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Sunday, April 19th, 2026 AT 11:12 AM

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