Question about 1994 Chevrolet S-10

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My 1994 s10 Blazer fan speeds do not work unless I unplug a connector from the blower motor and plug it back in. Could it be a relay and if so where is it located?

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I would be more suspicious of the connection itself. Pull it apart and clean it up with some fine sandpaper or steel wool. Make sure it has bare shiny metal contacts. Pull the boot back on the sire and look for corrosion ( green gunk) on the back. Clean it off or replace the connector. Also if it's a flat connection then crimp the tabs on the female connector to ensure a tight fit. Hope this helps.

Posted on Sep 05, 2010

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Related Questions:

1 Answer

Fan is not running


First check the fuse in the fuse box .
It also depends on witch fan /engine cooling fan /Blower motor fan.
Engine fans will have a relay more so then a blower motor .
The differences is this the blower draws more power and runs on a different ckt then the engine controls .So you can use the blower motor with out the engine running key on .
You don't say witch one you are having the problem with so I will try to explain both .
Most of the time both have relays and fuse's .The heater fan works on HI only off the relay so the relay is good if it works on HI.
The relay for the fan to cool the engine is different it controls all speeds do to temp change its cold some times has to handle more information .The relay the one thing they both have in common is the connections tend to get corroided Most of the time you can unplug and clean the plug in connectors to fix the issue

Jul 09, 2016 | Cars & Trucks

1 Answer

Is ask a question about a 1993 Chevy s10 truck AC blower motor when I bypass the relay the fan motor comes on full speed and a dash which will not slow down or speed it up or even turn it on


CHECK UNDER THE DASH ON THE PASSENGER SIDE AND FIND THE FAN MOTOR, THERE SHOULD BE A

Blower Motor Resistor WITH PLUG ON IT, IT SHOULD BE HELD ON WITH 2 SCREWS. THIS IS THE SWITCH THAT CONTROLS FAN SPEED.

Jan 13, 2016 | AC Cars & Trucks

3 Answers

Where is the heater blower relay located on a 1997 Chev. S-10 Blazer


It's located on the blower motor. If you can see the blower motor it's right there. That controls your fan speed. Hope this helps.

Mar 18, 2015 | 1997 Chevrolet Blazer

1 Answer

Blower motor resistor


Locate the blower motor and look around the outside and close to the motor for a 2-by-3-inch plate held on by two or four small screws. There will be an electrical connector plugged into it with five or six wires, depending on the vehicle type and heating and air conditioning type of control panel.
Test the resistor before replacing it. It is always recommended to test any electronic unit before replacing because there are a multitude of things that could cause the same symptoms. It only takes a few minutes and can qualify the assumption that a part is bad. It will save money to replace or repair the right part the first time.
Check the speeds by turning the fan conrol to all positions. Take note which fan speeds work and which speeds do not work. If the fan works only on one speed the blower motor resistor is very likely bad.

Check the fuses if the fan speeds do not work. The fuses for the interior heating and air conditioning fan are usually under the hood in the fuse and relay center. If the fuse looks good, then take it out and turn the ignition key on and use the volt meter set at 20 volts DC. Check to make sure that there is voltage to the fuse. If not, check for an open circuit to the fuse.

Check the relay to determine if there is power at the fuse. The relay should have two of the four terminals showing power. With the key on and the fan turned on, remove the relay and put it back in, listening for it to click. If it does not click, then replace the relay.

Check the voltage at the electrical connector on the blower motor resistor to see if the fuse and relay are good. Make sure that power is present at the connector with the key on and the fan switch on. There should be power at two terminals of the blower motor resistor. If only one terminal has power, replace the resistor. If two terminals have power, replace the blower motor itself. Remove the screws and unplug the connector to remove the blower motor resistor. Put the new one in its place by screwing it back in and plugging in the wiring connector.

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May 28, 2012 | 2003 Ford Explorer

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Where is the blower motor relay on the 1994 Ford Econoline. The fan is going one speed - SLOW. I replaced the blower motor, because it was squealing, but that never solved the problem. I'm thinking it's...


On your vehicle, if it works on low speed, that eliminates the fuse, the blower motor relay and the blower motor resistor. All of the parts of the resistor must bee good for it to work on low. The relay supplies power to the motor and the controls provide the ground, so if the motor runs at all, it is not the relay or the fuse. The only thing left is the switch. Fords are bad about burning the wire connector that conects to the switch. You will most likely have to replace the switch and the connector. Both of these parts are widely avaiable at most aftermarket parts stores.

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The heater fan blower in my 85 chevy blazer s10 4wd does not go on switch to low, medium, or high anymore when the dial is turned. Sometimes about five miuntes later it will swicth to the highest setting...


There is a blower motor resistor under the dash in the middle or closer to passenger side. It should be attached to the ducking with two bolts or screws. There will be a connector to unplug with probably about 4 wires. That resistor goes bad and will cause the symptoms your describing. Remove the connector, Remove the bolts or screws, and replace in opposite order. Very simple to replace but locating and actual replacement will sometimes be difficult. Talk to your local auto store and most should be able to point you in the right direction. The part should be around $20. Let me know how it works out for you. Thanks.

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2 Answers

On my 1994 S-10 Blazer, the heater/a/c fan is intermittent.What is most likely the cause?


Check and make sure you have good connection at blower motor, if you can next time it does that, check with test light if you still have voltage at blower motor, if no voltage, bad connection, if you do have voltage blower motor starting to go out.

Jul 22, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

I have a 1994 Buick LeSabre Limited with a blower motor that will not run. When I hook the motor up directly to the battery it works, and when I put a voltmeter on the plug that goes into the blower motor...


The blower motor fuse,or relay is not working,check these,and the blower motor switch.The relay is activated by connecting ground to the relay.Best bet,is the blown fuse.

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1 Answer

Fan only works on 4 and 5 settings? Is this a


Hello,

I have a 2003 Chevy Cavalier. The HVAC airflow dial only works on high setting. We checked the fuse and it's o.k.

What now?  Any estimate as to repair cost? 

Thank you

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