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BigBob, Shop manager/technician
Category: Chevy
Satisfied Customers: 4838
Experience:  Shop Manager with 25 years experience
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2006 chevy: blower not operating Get 7 leads..resistor

Customer Question

2006 chevy equinox HVAC blower not operating Get 7 volts across fan leads is there a way to test resistor pak
Submitted: 5 years ago.
Category: Chevy
Expert:  BigBob replied 5 years ago.
Greetings and welcome to just answer!!!!!!!!!!

Check for power to the blower motor from the 40 amp fuse in the under hood fuse center. Ground the Purple wire at the blower and it should run on high speed. Ground the Yellow wire from the blower resistor and it should run on low speed. If it does not run, the wire to the blower is bad. If it is ok, replace the resistor.

Please let me know if I can help further,
Customer: replied 5 years ago.
I'll get right back to you
Expert:  BigBob replied 5 years ago.
no problem I will be here!

Customer: replied 5 years ago.
Bob how does this work I accept your answer but if I have another question can I still ask you fro the 29 I have to run the kids to the field be right back
Expert:  BigBob replied 5 years ago.
You can always get back to me here, by responding here it will come straight to me.

BigBob and 4 other Chevy Specialists are ready to help you
Customer: replied 5 years ago.
OKay, power at fuse under hood is ok
Grounding Purple wire at blower or yellow at resistor wires does not work.
measuring 6-7 volts on Blower red/white wire
Found additional fuse center at passenger side in car
BCM/Blower fuse ok swapped HVAC relay with same type wiper relay no difference
can hear relay acuated at key turn
Resistance to ground changes at yellow resistor wire when turning fan speed dial
removed fan assemlby and bench tested , OK
any ideas.
Car is pretty clean if blower power lead bad any ideas on why . Does it come from relay
under dash on passenger side?
Expert:  BigBob replied 5 years ago.
I have to ask, did you ground them with the controls on, key on and plugged in?
At the interior fuse block remove the blower relay and check for power on 2 terminals with the fan set to high speed, and ground at the other 2 terminals. If OK, replace the relay.
If no power on one terminal check the Yellow wire to the control module for a open. Check at the control module for power on pin 1 Purple and Yellow pin 5 (fan switch still on high speed). If no power on pin 5 but OK on pin 1, replace the climate control head

Customer: replied 5 years ago.
yes key on,controls on, resistor plugged in.
I will check contacts at interior fuse block.
What do you mean by control module?
Climate control head is complete assembly of knobs?
Expert:  BigBob replied 5 years ago.
Control module is the resistor. Control head is dash unit yes.

Customer: replied 5 years ago.
already tried swapping relay with one used for wipers,no change
control module,resistor pack has no voltage, just varying resistance to ground as you change speed , 2 purple wires a & e and yellow blue brown leads,

at relay on lead 14 v one lead 5 volts
remove resistor and get 5 volts a pin a
something shutting down voltage
any ideas on how to access climat cintrol head
Customer: replied 5 years ago.
Okay now I'm perplexed. I don't have that 12 volts on the red white at blower, I don't see how HVAC module could affect that. Isn't that a straight from from fuse to motor. This is great info and well worth the 29 I hope you get at least 25. I will look further tomorrow .
Expert:  BigBob replied 5 years ago.
If you do not have power on the red white at the blower then the others do not matter. Have you checked that 40 amp fuse. If there is power coming out of that fuse then the wire is bad somewhere. don;t worry about the control head yet.

Customer: replied 5 years ago.
OKay, saw power for a second had neighbor watch meter and opened door to open hood and power went from 6 volts to 14 close door down again open door up.
dropped cover at drivers side and tugged on harness and trouble cleared. Cna't reproduce
again by moving harness closed up everything Everything okay
Only thing I know is 2 months ago had garage fix drivers side door actuator, did not want to mess with door trim, first time I've had a decent car,maybe something got smushed while trouble shooting.
Works now Schematic was key so I understood what I was looking for
Thanks Much
Expert:  BigBob replied 5 years ago.
Great news!!!!

Let me know if I can help further,