Question about 1999 Pontiac Bonneville

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1994 bonneville blower problem

Having a problem with blower motor. Happens in any mode, heating, cooling etc. Fan will not not run sometimes and will run ok other times. When it is not running, sometimes it will start while driving. Suspect relay, but don't know which one it is in the relay box on firewall. Would appreciate advice.
Thanks

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  • rgear2 Dec 18, 2008

    I also have the same exact problem with my 1994 Bonneville. Sometimes the blower will run, sometimes not. If it's not blowing, I keep it set on the high fan speed and then after driving for awhile or just having the engine idle while parked, all of a sudden the blower will start blowing. Since the problem is intermittent, what do you suspect? Relay? Which one? Or Blower motor itself?

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The blower relay is the third one from the left ,,under the hood on the firewall ... also the high blower resistor is on the center of the firewall ..behinde the relay bracket

Posted on Jan 25, 2009

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Heater and ac sometimes won't work til i drive for awhile


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58f261e.jpg

Fig. 1: The blower motor and fan assembly is mounted in the heater and A/C module, and is accessible from the engine compartment

GM Bonneville/Eighty Eight/LeSabre 1986-1999
Blower Motor - REMOVAL & INSTALLATION
(see Figures 1 and 2)
  1. Disconnect the negative battery cable.
  2. If necessary, tag and disconnect the number 2, 4 and 6 spark plug wires from the ignition coil and move the coil out of the way.
  3. For 1993-99 vehicles, remove the nuts and cross brace bar.
  4. Detach the electrical connections from the blower motor.
  5. Disconnect the cooling tube from the blower motor.
  6. Unfasten the screws securing the blower motor to the blower module assembly.
  7. Remove the blower motor and fan assembly from the module.
  8. If necessary, unfasten the nut attaching the fan to the blower motor shaft, then pull the fan from the blower motor.
68515cf.jpg

Fig. 2: You can disassemble the fan from the motor by removing the retaining nut


To install:
  1. If the fan was removed from the motor, position the fan on the shaft, then install the retaining nut. Tighten the nut to 12 inch lbs. (1.4 Nm).
  2. Position the blower motor and fan assembly to the module, then install the retaining screws. Tighten to 5 inch lbs. (0.6 Nm).
  3. Connect the cooling tube to the blower motor.
  4. Attach the electrical connector to the blower motor.
  5. On 1993-98 vehicles, install the cross brace bar and retaining nuts. Tighten the nuts to 18 ft. lbs. (25 Nm).
  6. If removed, install the coil and connect the spark plug wires, as tagged during removal.
  7. Connect the negative battery cable.

Hope this helped (remember rated and comment this).

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