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Old 07-14-2010, 07:47 PM   #1
uhlemd
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2004 VUE 2.2L
Default 2004 VUE 2.2 A/C Blower Switch?

Blower (fan) does not come on. A/C engages when switch is turned on and stays on throughout all 4 speed settings. Removed blower motor & put 12VDC to it & motor runs fine. Getting 12VDC at blower motor connector so I think the ground is OK. Switched out relays with power window relay & that checks out fine. Blower doesn't work on high which would eliminate resistor card. My only other option is the control switch. Am I missing something? (before I replace the switch) Thanks so much for everyone's help!!

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Old 07-14-2010, 10:14 PM   #2
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Default Re: 2004 VUE 2.2 A/C Blower Switch?

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Originally Posted by uhlemd View Post
Blower (fan) does not come on. A/C engages when switch is turned on and stays on throughout all 4 speed settings. Removed blower motor & put 12VDC to it & motor runs fine. Getting 12VDC at blower motor connector so I think the ground is OK. Switched out relays with power window relay & that checks out fine. Blower doesn't work on high which would eliminate resistor card. My only other option is the control switch. Am I missing something? (before I replace the switch) Thanks so much for everyone's help!!
Sounds like you nailed it ... you can find a schematic in post # 4 of following thread (indicates 05 but same as 04):

http://saturnfans3.saturnfans.com/~s...d.php?t=144044

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Old 07-15-2010, 09:54 AM   #3
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2004 VUE 2.2L
Default Re: 2004 VUE 2.2 A/C Blower Switch?

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Sounds like you nailed it ... you can find a schematic in post # 4 of following thread (indicates 05 but same as 04):

http://saturnfans3.saturnfans.com/~s...d.php?t=144044
Well...I thought I nailed it too Replaced the control head...same problem. Any ideas ???

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Old 07-15-2010, 10:00 AM   #4
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Default Re: 2004 VUE 2.2 A/C Blower Switch?

Check for ground again.

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Old 07-15-2010, 10:05 AM   #5
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2004 VUE 2.2L
Default Re: 2004 VUE 2.2 A/C Blower Switch?

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Check for ground again.
At what points do I put the meter ?

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Old 07-15-2010, 10:28 AM   #6
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Default Re: 2004 VUE 2.2 A/C Blower Switch?

You measured for 12v and found it on the connector but ground for the blower motor goes through the black wire to someplace close by and attached to the chassis. Measure the return wire to frame (anywhere frame/metal) using resistance - a continuity test to find out whether the ground is connected or not. All current goes through one ground connection and its been found that the blower ground wire can be loose resulting in cooked wiring as indicated by burned insulation.

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Old 07-15-2010, 11:00 AM   #7
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Default Re: 2004 VUE 2.2 A/C Blower Switch?

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Originally Posted by fdryer View Post
You measured for 12v and found it on the connector but ground for the blower motor goes through the black wire to someplace close by and attached to the chassis. Measure the return wire to frame (anywhere frame/metal) using resistance - a continuity test to find out whether the ground is connected or not. All current goes through one ground connection and its been found that the blower ground wire can be loose resulting in cooked wiring as indicated by burned insulation.
According to the schematic I suggested the OP consult - the blower motor ground wire is brown and is routed to the HVAC BLO relay in the I/P fuse block. The ground is made available to the HVAC controller when ignition switch is placed to RUN.

OP mentioned swapping the relay with nothing gained so I assumed he meant the HVAC BLO relay and I agreed the switch could be kaput.

uhlemd ... did you substitute for the HVAC BLO relay?

If no, then try another relay. If you did try another relay, I suggest you remove the relay and note the location of which sockets correspond to pins 30 and 87 on relay.

Use a heavy piece of wire - with one end connected to ground and carefully insert the other end into the socket for pin 30. See if fan runs with ignition ON and any speed selected. If fan does not run insert the wire in pin 87 and check for run. (Check and double-check to avoid putting the ground on pin 85 or pin 86).

If fan does not run, the problem would be in wiring between the relay and HVAC controller, or inside controller.

If fan does run it indicates the wire between the HVAC BLO relay and ground is probably open at / near ground-point G203. I can give you a location for this ground if this is the culprit.

Good luck!

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Old 07-15-2010, 01:02 PM   #8
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Default Re: 2004 VUE 2.2 A/C Blower Switch?

i had this same problem, the power wire going to blower motor shorted, had to run a new wire bypassing fuse box underhood. once new power was ran ac works perfectly

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