Question about Pontiac Bonneville

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On the 2002 pontiac bonneville blower motor connector, there is 3 wires, what are they, ground, 12v power and the third wire? do you know which one is which, I think they were black, purple and brown.

Removed blower motor assembly, it will run half the times when turned on, there seems to be an intermittent connection, or I noticed that when the motor will not come on by itself, you can see it tried and by giving it a spin with your finger it will start.

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The motor is variable speed. Ground, 12 volts and motor control. You need a volt meter and a manual.

Posted on Dec 06, 2014

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Heater doesnt work


The first thing to check would be the most common which is the blower resistor. the resistor is located on heater box next to blower. if you locate the blower then wire to blower and then follow wires back and they will lead to resistor.
A good test to do to see if it is the resistor would be with a test light you will test for power at blower, make sure to turn key on and heat on with blower switch on, then with the test light check for power at the blower.
if it is a bad blower resistor then you will have power at one wire on the connector that connects to blower motor, that means there is no ground going to blower, that ground is controlled by resistor to control the speed settings.its is the switch itself or resistor but i would say resistor, if you had a power probe you could test switch but i will not confuse you with that.
Now if there is no power to one of the blower wires then a fuse is what you will need to replace,
and the last test to be sure it is the resistor would be to use a piece of wire , make sure you know which wire had power to it, as you will be sticking the other wire, so take your wire and stick into connector at blower and take the other end and touch a good ground, you may see a little spark, thats okay. the blower should run.

Dec 21, 2012 | 2002 Pontiac Grand Prix

1 Answer

I have a 1999 Bonneville. Heater blower will not work. Replaced blower, and the control panel on the dash. Still nothing. Checked fuses, all seem to be good. (Also the lighter and trunk latch inside car...


Verify you have good power and ground at the blower motor if so replace and make sure the wires are not routed near the blower motor.

Keep us updated.

Sep 27, 2011 | 1999 Pontiac Bonneville

1 Answer

940olds 98 temprature controls all appear to function but there is no ac and the fan dont work. is it a relay? if so which one?


It sounds to me like you need to diagnose your blower motor circuits. If the blower does not work on any speed including HIGH, then the problem is most likely the blower motor itself or a burned connector at either the blower motor or the blower relay.

The first thing to check would be to see if there is battery power and ground present at the blower motor electrical connector. If there is power and ground, replace the blower motor.

If there is now power at the blower motor connector, then you should check for power at the relay. There is a string of five relays mounted to your radiator support at the right front. The blower relay is the one in the center of this string. (the third one - no matter which direction you are counting. It is a 5-pin relay. If the ignition is in the ON position and the blower control switch is in any position other than OFF, there should be voltage on 3 of the pins. Of the other 2 pins, one is battery ground and the other goes to the blower motor connector.

NOTE: the PURPLE wire at the blower connector is power and the BLACK wire is ground.

Aug 20, 2011 | 1994 Oldsmobile Cutlass Ciera

1 Answer

The heater fan just stopped...


Check fuse #14(10amp) located in fuse box under driver steering wheel behind the lower dash cover.
Check fuse#12(40amp) located in fuse box under hood.
Replace fuse(s) if any are blow.

If fuse are good.Check blower and transisto next.
Do steps 1-3 with turn key on
1. Unplug connector and check for 12v at the blue/white wire at the blower motor(2-NAT)
-if there's no voltage you might have a bad relay or open in the wire
-if there's about 12v, go to step 2
2.Plug connector for blower motor and unplug connector for blower transistor(4-NAT). Take a jumper wire and jump the blue/black wire to body ground.
-if blower does not run, replace blower motor
-if blower motor runs, go to step 3
3.check the black wire at(4-NAT) for good ground.
-if you have good ground, then replace blower motor transistor.
good luck

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Jan 18, 2011 | 2004 Honda Element

1 Answer

2005 kia spectra blower dont come on for the heater


The 2005 Spectra heating system comprises 4 main components and its associated wiring.

1. Blower Relay- supplies power to the blower motor when the key is in the on position

2. Blower motor- Located in the right side dashboard area near the passengers right foot. ( photo attached)

3. Resistor- located on the ground side of the circuit to control speeds 1 thru 3. Note" High speed bypasses this component.

4. A/C Control Module- This is the control pad in the dashboard with the blower speed controls.

The easiest way to diagnose this circuit is to split the circuit in half to determine if you have a power supply problem, ground control problem or a failed component. From your concern I am going to assume that none of the speeds work. If some of the speeds work let me know which ones and I will revise the diagnosis tree I made for you.

Key state for all tests is Key on/Engine off. Heater on and blower setting between 1 and 4.

Step 1. Verify the 30Amp blower fuse in the underhood fuse box has power and is not "Blown.

Step 2. Locate the blower motor by removing the lower kick panel on the passenger side dashboard and glove box. You will need a Phillips head screwdriver.

Step 3. Disconnect the two pin connector at the blower Connector G-02 in the attached photo. The red and blue wire is the power supply wire to the motor so with the key on/engine off check for power with a test light or volt meter. Spec: Battery Voltage. If good proceed to step 4. If no power proceed to step

Step 3.a.- the blower relay above the blower (connector G-06) and verify you have power leaving the relay. This is the red and blue wire ( Pin 4) I attached a photo of the connector to help locate the correct wire. If you have power at this pin the relay is working and you have an open between the relay and the blower motor. If you do not have power at this pin proceed to step 3.b. Verify that the relay clicks when you disconnect it from the harness and plug it back in. If it "clicks" and you have no power at pin 4 you have a bad relay. If it does not click you will need to check the power supplies to the relay. These are pins 3 (blue wire) and Pin 5 (Red wire). Be careful to check the correct blue wire as the other blue is the ground for the relay. (Pin 1). If you do not have power at either wire you have an open in the harness and further diagnosis will be needed. If you do have power at these wires then check the remaining blue wire for a ground. If you do not have a ground you may have a bad control module. To check this remove the plastic cover around the control head and radio and remove the control head from its mounting but leave plugged in to the harness. Check the white and blue wire in pin 21 of the large connector. It is located 3 pins in from the bottom left of the connector. (See attached photo). If you do not have a ground then you have a bad control module. To verify this you can ground this wire with a test light or fused wire and see if the relay "Clicks". If you do have a ground at this pin then you have an open between the relay and control head.

Step 4. - Ground check- Go to the blower motor connector and check the green and red ground wire (Pin 2) for a ground with the blower switch set to 4. This bypasses the resistor easing diagnosis. If you have a ground then the blower motor is at fault. If you do not have a ground proceed to step 5.

Step 5. Access the control head large connector. Leaving it plugged into the control head check pin 23 (Yellow black wire in the lower left corner of the connector) and verify you have a ground. If you do not have a ground you have a faulty control module. If you do have a ground you have an open between the blower motor and the control head requiring further diagnosis. simplesol907.jpgsimplesol907_0.jpgsimplesol907_1.jpgsimplesol907_2.jpgsimplesol907_3.jpg

Jan 08, 2011 | 2005 Kia Spectra

1 Answer

How to replace AC Heater blower motor on a 2002 pontiac Granprix


If youre changing it because it wont blow, try applying power to it first. It is on the passenger side under the dash if you take off the panel above the passenger feet. has a 2 wire plug in apply 12v to the motor, if it works replace the more common blower motor resistor which is located 3-5inches towards the front of the car from the fan itself. Also be sure to check your fuses.

Jul 31, 2010 | 2002 Pontiac Grand Prix

2 Answers

HEATER BLOWER MOTOR NOT COMING ON THE BLOWER MOTOR IS GETTING POWER TO THE CENTER BROWN WIRE BUT IT ALSO HAS A BLACK WIRE THE SAME GAUGE AS THE BROWN CENTER WIRE AND A SMALL GAUGE BLACK WIRE ON THE OTHER...


at blower motor connection, disconnect wires and run a 12v line to the positive side of motor and ground the other side if need be. if motor runs then you have a fuse or a wire problem. if it does not run. then blower motor is bad.

Feb 27, 2010 | 2004 Pontiac Bonneville

1 Answer

Blower motor for heat and cool is not working


Disconnect the power resistor on the blower motor and try to link a with a direct wire from battery to check if the blower motor is OK. if the motor runs with the link, check if you have power on connector for power resistor. If so, the power resistor is gone. in that case, replace this item. If you have no power at the connector, check wiring back from resistor to switch in dashboard, till you find the broken wire.

Oct 25, 2009 | 1991 Pontiac Bonneville

1 Answer

Hello I have a 1997 Bonneville SE 3.8 with climate control display shows AC is on and Blower is high. BUT no AC and no Blower. I checked power connector at the blower motor and is reading 1.5 Volts.


you need new blower module located at blower under hood, against the firewall under the relays it has four or five wires in it, and two bolts holding it in.

Sep 02, 2009 | 1997 Pontiac Bonneville

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