Question about 1992 GMC Sierra K1500

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Replaced the blower switch still not blowing air I tested the plugs and have power to one

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Could be the blower relay, or the blower resistor.

Posted on Apr 26, 2010

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Jan 30, 2016 | 1977 Buick Electra

1 Answer

Heat NOT blowing out ANY air consistently!!


Can be blower motor easy to test --remove it look for imbalance by spinning to check bearing smoothness / freeplay . Hook up ground then use inline fuse connector with lower than fuse panel ## number of fuse -- find power Eg .car battery -- be sure to ground then connect Fan to visually see it spin .. NOW if you have any type of electronic dash mounted controls for heat / air conditioning - most likely electrical issue is in it . you said blower motor does sometimes function - Test wires that plug in to it for power / find groung then probe by test light when in heat mode = switch to air cond mode if fan functions then problem in controls on dash .. if no test light reaction search wires for short or damage .. As FUNNY as it sounds I have pulled mouse nest out of GM heater fans - They access parked vehicle by drain hole inner fender well it drains water from wiper blade / heater vent area .

Nov 13, 2014 | 1999 Chevrolet Blazer

1 Answer

My 1997 Mazda Protege heater does not blow air, i replaced and tested blower motor, resistor and fuses inside the cab. Still nothing


Before replacing the blower motor, you should have checked the motor's input wiring loom for power.
Do you have power here?

If you don't have power, then you need to check your blower switch output wires.

Nov 04, 2012 | 1997 Mazda Protege

1 Answer

Heat and air Condition dont blow


The heat or air do not blow, this would mean the blower motor is not working, the first step would be to check the blower resistor as this is a common problem on these.The best way to test this would be with a test light.Take the test light and turn heat on then check blower connector for power, note unplug connector and test, make note of which wire has power, then connect the plug back. using a piece of wire connect one end to a good ground and stick the other end into connector on the blower that had no power and see if blower runs. If the blower runs then you have a bad blower motor resistor, this is located next to the blower on heater box, if you follow the wires from the blower it will lead you to resistor, unplug resistor and check for burnt connector. if connector is damaged then you will need to replace the connector also, then remove screws holding the resistor in heater box and remove it.
Back to testing if you do not have power on one wire at the blower then check all the fuses, Next if you have power and the ground does not turn blower on then try tapping on the blower motor to see if it turns on, in either case if there is power and a good ground to blower then blower will need replacing. Hope this is helpful good day.

Apr 26, 2012 | 2000 Chrysler Concorde

1 Answer

I have a 1999 Jeep Grand Cherokee Limitied


hello what i would do is try turnning the blower switch to a slower or faster speed you might have a bad blower speed switch also try tapping the switch knob if it comes back on replace the switch if it doesnt then simply turn the switch on and try to manipulate the connector plug at the blower motor mabye bad electrical connection if it turns on and off you may have to replace terminal ends at connector at blower motor. also you could use a test ligt at connector to check for power if it will light a test light it should run.

Feb 29, 2012 | 1999 Jeep Grand Cherokee

1 Answer

FAN BLOWER (FOR A/C AND HEAT) ONLY BLOWS ON THE HIGHEST SETTING. IS THERE A FAN SPEED CONTROL OR RELAY THAT CAN BE REPLACED, OR IS IT SOMETHING ELSE?


Hello leebarker
The blower moter switch or the blower moter controler can cause this
problem. Remove the plug from the switch, use a 12v test light to locate
the 12v power wire in the plug. Next with a small jumper wire bring power from the 12v contact to the low and medium speed contacts on
the plug if the blower changes speed replace the switch if it still only
has high replace the controler. The blower controler is located on the
passenger side end of the heat-a/c box near the blower moter.
By the way the key must be in the on position for this test.
I hope this helps. Good luck.

Jul 10, 2010 | 2002 Jeep Grand Cherokee

2 Answers

2002 Jeep Liberty - Air conditioner not blowing. Replaced blower relay switch - Still not blowing. When car is in motion, you can feel cold air at the vent, but the blower is not blowing the air into the...


OK. So the blower notor isn't operating. Do you have power to the blower motor? The resistor is new from what I got. If you don't have power to the blower motor, then check the speed control switch and fuses. If you have power at the blower motor, replace the blower motor

Jun 16, 2010 | 2002 Jeep Liberty

1 Answer

Does not blow any air


check the fuse with a test light on both sides with the key on,if you have power go to blower motor under glove box and turn on switch and probe wires at motor,if no power check blower motor resister, if you had power at motor plug,replace motor

Dec 06, 2009 | 2006 GMC Sierra

1 Answer

Heater will not work


If you have power to it and it doesn't work, the blower motor needs to be replaced. The AC may be related.... if the blower can not come on it may interfere. If not, you will first need to have the pressures checked.

May 15, 2008 | 1988 Oldsmobile Firenza

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