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Old 03-12-2004, 03:10 AM   #1
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Default Blower Fan Diagnostics

My blower fan for my climate control stopped working and I tried the following.
First off I test voltage at the harness and still got 9.5 volts on high speed, then I applied direct 12v from the battery and the fan started right up. All fuses and relays related to the blower check through fine. So what can it be? Blower module doing wacky things or what?
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Old 03-12-2004, 03:25 AM   #2
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So, you got 9.5 volts where? Between the climate control and the blower, or before the climate control?
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Old 03-12-2004, 03:32 AM   #3
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At the harness connector that connects into the fan'* connector.
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Old 03-12-2004, 03:35 AM   #4
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So between the harness and the fan, power was lost. Did you check ALL the wiring? Make sure the fan'* end of the wire in the harness made contact with the lead from the other end of the harness.
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Old 03-12-2004, 03:37 AM   #5
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Uhh...getting confused. Basically make sure the harness connector is making contact with the leads on the blower fan itself?
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Old 03-12-2004, 03:41 AM   #6
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Sorry, the leads in the harness itself, do they all make contact? One get pulled out, bent, etc.
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Old 03-12-2004, 03:45 AM   #7
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K, I think I got you now. Tomarrow I'll pick at the prongs inside the harness connector and pull them "out" a little to make sure the blower leads make a good connection. Otherwise what other connectors to check? The back of the ECC (electronic climate control) itself?
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Old 03-12-2004, 03:49 AM   #8
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Yeah, check the ECC. What voltage does the fan run on anyway? I'm assuming 12v is full speed, is 9.5 middle of the range?
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Old 03-12-2004, 02:49 PM   #9
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This one is a stumper because there is voltage at the fan harness and the fan runs when voltage is applied to it. Therefore it has to be a bad connection at the fan, doesn't it?

I might be tempted to remove the pins from the harnesses and touch them together to test/ensure a proper connection.
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Old 03-12-2004, 03:30 PM   #10
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Wouldn't I get a spark (potentially bad?) if I touched the harness pins together?
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