Question about 1998 Chevrolet S-10 Pickup

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1998 s-10 blower motor not working

I tried a new resistor pack and relay no luck I hooked 12v to the motor and it spun. voltage check across motor connector shows 14v one side and little or nothing on the other until you put it on the highest speed then you get 14v on both wires??? Please help it's too cold to drive without heat.

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  • dragon28 Jan 21, 2009

    I do have a test light and a multimeter. Let me know what to check. The blower will not run at all.
    thanks


  • Rick Byrd
    Rick Byrd May 11, 2010

    ok to start from the beginning there is a HVAC 20 amp fuse in the fuse panel inside vehicle , and the is a 30 amp fuse under hood fuse block , it is for the HVAC also , (heating ventilation air conditioning) , for speeds 1 - 2 - 3 , power starts at the 20 amp panel fuse and goes to the mode selector , if the mode selector is in any position except off it will sent 12 volts thru a brown wire to the speed switch and the resistor , if you can put mode sector in lets say the heater position , and the speed selector in low position , go to the resistor , find the brown wire , check it with your test light , do you have power ? if yes lets continue , if no , we have a problem with the panel fuse or wiring or mode selector , lets hope not , NEXT , if you did have power at that brown wire , check the dark blue wire at that resistor , it should be hot also , if so , probe the purple wire at the blower motor connector , it should be hot also . let me know what you got so far , i'll try to keep an eye on your update comment and get back asap .

  • Rick Byrd
    Rick Byrd May 11, 2010

    if you haven't solved this problem yet , comment any new test results you may have , and we will get back with you , and do you have a test light ?

    J5


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Try replacing the switch that turns on your fan from the consel. mine only works 1-3 and 4 shuts off.

Posted on Jan 24, 2009

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I have a 2004 ford f250 that the blower motor isnt working. Checked fuses and relay ok. No power at connector on blower motor, hooked up jumper wire to circuit and now works fine


You have a bad blower motor resistor ! It's near the blower motor ! has four wire connector to it ! The orange an black wire at the blower motor comes from the resistor !

Blower Motor Resistor 1AHBR00036

Apr 04, 2015 | 2004 Ford F250

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Ok, my blower was not working at all. It used to work on the 2 and 3 setting. I replaced the resistor nothing. Took out blower and hooked it up to 12 volts it came on. So I went and bought a new control...


the blower motor is going. It's drawing too much current and taking out the resistor pack. It has a thermal limiter that melts when the resister gets too hot. Repalce motor and resistor.

Dec 10, 2010 | Ford Focus Cars & Trucks

1 Answer

Heater fan just quit working. Cant find a fuse for it anywhere. Checked the relay and the switch and they seem fine.


Blower Motor not working for all speeds or not at all.

What does it take to get air to come out the vents?

1. Power from the battery or alternator, wiring thru a fuse and possibly an accessory relay to the switch

2. Switch and wiring to channel voltage to the appropriate resistor corresponding to the desired speed

3. Resistor set to reduce voltage to the blower for settings less than high

4. Final wiring to blower and blower itself

Because there is usually no relay between the switch and the resistor, all of the blower current runs through the switch. This sometimes causes the switch to overheat and fail over time. Depending on how the switch is designed, the failure may allow multiple currents to run to the resistor pack, and this may in turn cause the resistor pack to overheat and fail. An example of the circuit I'm describing is shown below:


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Note that if the above switch was to contact both terminals 2 and 3 simultaneously, there would be more current than the resistor pack is designed for. This can burn the resistors and/or blow the thermal breaker. Also note that if the resistor pack fails, the blower can still run at full speed.

Troubleshooting: The last sentence above is a clue.

If your blower is working only on high speed, the likely cause is a failed resistor pack. However, because of the other discussion above, you should also troubleshoot the switch to see if it is the reason the resistor pack failed.

If the blower does not work at all, odds are that the problem is the fuse, relay, or the motor itself.

Repair: The resistor pack is installed in the air stream of the system to help cool the resistors. It is usually accessible from under the dash on the passenger's side or sometimes from the engine compartment along the firewall. It is identifiable by the connector with several wires coming out-some going to the switch and some to the blower motor. The resistor is replaced by unscrewing it from the duct and reinstalling the new resistor pack.

The blower is usually accessible from above the passenger

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1 Answer

MY HVAC fan stopped blowing. Checked all the


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.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

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1 Answer

No heat or air


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.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

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1 Answer

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Check the blower multispeed control resistor pack is not faulty.
The resistor pack is usually located in the air ducting, in the blower fan airflow.
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1 Answer

Where is the front fan resistor unit?


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1 Answer

Ac blower motor


Check fuse supplying fan is not blown,
Check blower control switch is operating OK,
Check relay controlling fan is operating OK,
Check variable speed resistor pack is not faulty (the resistor pack is usually located in the blower ducting, in the blower airflow),
Check blower motor ground connection is not missing.

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4 Answers

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I went through the same thing with my 99 suburban. It turned out to be the dash fan control switch. It is purchased seperate from the whole cluster for under twenty dollars. The instrument panel cover comes off gently by hand with the tilt steering in the down position. You have to then unplug the electrical plugs to get it out of the way. The heater ac control panel then comes out by hand far enough to unsrew the heater fan control from the back.

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