Blower Fan Diagnostics

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03-12-2004, 04:54 PM

#11

acg_ssei

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Re: Blower Fan Diagnostics

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Originally Posted by Allmachtige

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?

I'd expect high speed to be giving a full 12-14 volts at the motor, not 9.5. You're sure that you had a good tester connection when measuring that voltage, right? If so, the resistor pack or blower controller (depending on whether you have the manual or electronic climate controls, respectively) may be failing on you.

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03-12-2004, 06:07 PM

#12

fuddyduddy121

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I agree, it should be higher, but the fan should still run at 9.5V, too. His fan is completely off.

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03-13-2004, 05:27 AM

#13

Allmachtige

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To get the 9.5v reading I just stuck the positive and negative pointers of the multimeter into the respective pins on the harness connector that connects into the fan.

How do I locate the blower module/controller?