Question about 1998 Pontiac Bonneville

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Need to replace the Blower Motor Resistor. Pulled the control pack out from under the maxipack fuse block, but looks nothing like any of the images of the resistor available for sale online. Where does http://www.amazon.com/gp/product/B000C7ZUD8/ref=ox_ya_os_product this go?

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  • lightguar183 Sep 29, 2010

    The climate control console is all electronic with an automatic feature. The blower motor power leads are registering 1.8~1.9 volts. Did the Blower Motor Control Module completely replace the Resistor? The Blower Motor Control Module is located under the Maxipack Fuse and Relay Center, required three screws and had two plugs with several wires coming into it. It slots directly into and behind the Air Conditioner Evaporator. Is this the general location of the Resistor?

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  • Master
  • 1,978 Answers

Usually they are placed under the dash next to the blower motor on the fan shroud. The resister generates heat and needs to be cooled. The part shown may be an aftermarket equivalent That fits but looks different. You should see a least three to five exposed coils, one for each fan speed. Default setting is always as fast as the fan will go, the larger the coil the slower the fan moves. A dealer should be able to look at the part and identify if you have the resister. I have pulled them out ,soldered a melted connection and been able to fix the resister myself(got lucky).

Posted on Sep 29, 2010

  • David Belcher
    David Belcher Sep 29, 2010

    The blower motor resistor is located on the left side of the blower motor under the hood. It should have five wires going to the connector and two of the wires going from the resistor to the blower motor. It is hiding under the fuse panel cover on the left side of the blower motor. The blower motor resistor is under the fuse panel at the bottom on the left side of the blower motor.

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1 Answer

Chevy astro


2 fuses to check, Kevin: in the instrument panel fuse block, 20 amp fuse #12, Htr-A/C. In the under hood fuse block, Frt HVAC fuse, 30 amp.

The new resistor you put in, was it called a "Blower Motor Resistor and Relay Pack" ? It appears there is a relay there with the resistor, but appears to only be used with htr on high speed. However the low speed wiring is also routed through this relay. If it was the Pack you put in, guess that is not an issue.
In the Heater and A/C Control Module is the blower switch. The power in to the control module is a brown wire (from the #12 fuse in instr. panel). With key on should be hot. It appears the brown wire goes to the mode switch and then to the blower switch. Check for power in, and check continuity of both switches. Or check if blower switch has power to it, then check for continuity in it-it should have continuity in all speeds.
If all is good so far, you need to check if blower motor ground is good.
Here can be found a wiring diagram for your Astro. Look for heater controls under the system called "HVAC". Every wiring diagram and TSB for the Astro (or any make, model) can be found here:
http://www.bbbind.com/free_tsb.html
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Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
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Check the blower motor will run if +12v directly applied to the blower motor.
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Yes its the blower motor resistor.

More then likley theres some trash or something in it, or possibly the motor itself is on it's way out. There not that bad to pull out of that body car, just pull it out and see what you can see.

The blower motor is under the glove compartment

You can replace the resistor on your own. Please find a detailed diagram which would guide you to do it.

http://autorepair.about.com/library/images/bl629a-lib.htm

Thanks

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the blower resister is bad it is about $20 under passenger side of dash please rate my answer thanks!

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