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Chrysler Repair/"05 Pacifica blower Power Module

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Expert: - 1/5/2012


Question
Looking guidance once again. No front blower, no heat in my 05 Pacifica w/ auto climate control. Control display looks and runs normally. Checked fuses - good. Switched relays - good. Replaced Power Module - no change. Could it be the fan motor? Checked continuity through fan (black and green wires)and read 0 ohms.
Any other test I can use to pin-point the problem?
Thanks in advance.

Answer
Hi Jason,
The manual shows there to be a front blower motor relay which you could touch/listen for to see if it actuates when a helper selects the blower. Then check to see if fuse 42 might have a subtle crack in its wire, and also verify that it is getting power from the blower relay on one pin of the fuse socket when the blower is requested. Check that 12v appears on the dark blue wire at the blower module plug, similarly. Try a direct 12v jump to the blower motor plug at the module to check the blower motor. Somewhere along that chain something is faulty. Let me know. Usually when that module fails the motor runs continuously at high speed but maybe not in this case.
Roland

Chrysler Repair

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Roland Finston

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I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

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Five decades as a 'do-it-yourselfer' on domestic and imported cars

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Degrees in Physics/bruised knuckles.

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"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

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