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  #1  
Old 07-17-2010
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blower speeds malfunctioning

So, within the last few months my blower speed has been acting up. The problem is with the lowest 2 speeds. Sometimes speeds 1 and 2 do not work at all. Sometimes speed 2 is only as strong as speed 1. Whenever this occurs speeds 3 and 4 always work fine. The problem persists on all settings(ac, max ac, feet, feet/head, defrost). Any ideas on what could be wrong and/or how to fix it?
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Old 07-17-2010
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Blower motor resistors are common to go, but when they do you usually just have the highest speed.
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Old 07-17-2010
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maybe it's on it's way out....
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Old 07-25-2010
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Quote:
Originally Posted by blAckAnger View Post
So, within the last few months my blower speed has been acting up. The problem is with the lowest 2 speeds. Sometimes speeds 1 and 2 do not work at all. Sometimes speed 2 is only as strong as speed 1. Whenever this occurs speeds 3 and 4 always work fine. The problem persists on all settings(ac, max ac, feet, feet/head, defrost). Any ideas on what could be wrong and/or how to fix it?
i just started having that issue too. The lowest fan speed quit this week. Could it be the fan switch?
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Old 07-25-2010
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Could be just corrosion on the connections under the hood.
Can’t hurt to find the connector, clean up the connections and do one of two things.

One would be to clean the existing connections both the male and female sides, put on some Anti-corrosion Paste but not a lot and put the connections back together.

or

Using slip-on type solder wire lugs, clean the connections on the heater side attach the wire lugs to the wires of the harness, slide a piece of Heat Shrink on the wire, the kind with adhesive inside and slide the lugs on the appropriate connection in place; solder the wire lug to the connector, shrink the Heat shrink until you can see some adhesive coming out of the ends.
Easiest to do if you remove the resistor pac.
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Old 07-25-2010
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the contacts on the stator are worn out

not enough voltage is getting through

1 - 6 volts
2 - 9 volts
3 - 12 volts
4 - 13.4 volts

as per the dealership mechanic
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Old 07-25-2010
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Originally Posted by cheese_man View Post
the contacts on the stator are worn out

not enough voltage is getting through

1 - 6 volts
2 - 9 volts
3 - 12 volts
4 - 13.4 volts

as per the dealership mechanic
Im not very familiar with this aspect of my truck. Could you help me out with the location, how to get to it, and how to fix it?
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Old 07-25-2010
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the blower motor is accessible from inside the engine compartment

looking at the engine from the front ,, the blower is on the left side of the firewall

you will see a circular part the blower motor is bolted to it

the motor is not serviceable,, you will have to buy a replacement motor
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Old 07-25-2010
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haha awesome. I was thinking it'd just be a simple switch replacement.
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Old 07-26-2010
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Quote:
Originally Posted by lownrangr View Post
haha awesome. I was thinking it'd just be a simple switch replacement.
I have found in two of my Rangers it is not the switch but could be in your case.
Attempt to rework the Resistor Pak on the Heater Housing in the engine bay first before buying a new/used sw, just clean up the connections on the Resistor Pak and the Harness Connector first.

I have been told the resistor pak is almost always the problem when you don’t have all of the speeds in the blower.

The resistor pak is located to the driver’s side of the fan assembly in the engine bay.

Just thinking out loud, hope you get it fixed, post if/when you do and what you did.
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Old 07-27-2010
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DO NOT REPLACE THE BLOWER MOTOR!! If you have any fan speed the blower motor is working fine.

If you can't select the fan speeds the resistor and the resistor connector are corroded/melted and need replaced. The resistor you can get at Autozone, the connector for it (which you will have to rewire up) you will have to pull from another truck or buy at the stealership. I got my stuff from a 99 Expo with low miles.
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Old 07-29-2010
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so i ended up taking the truck to the dealer because i needed a new door latch and they looked at the blower issue and told me it was the switch. Later that day they said oh it's not the switch but the resistor BUT there were some wires pulled out of the switch connector so you'll need one of those too. Funny thing is, I had that panel off a few days ago and there were no wires pulled out. I just got back from telling them to leave it and I will do it instead of them raping me on their price to fix it.
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Old 07-29-2010
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I have some heater Panels with all switches in Silver if interested.
Might be a good time to change over.
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  #14  
Old 07-30-2010
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so i just picked up my truck and the 'broken connector' was one wire that doesn't snap into the connector. The hvac controls have never been taken apart so that was probably like that since it was new.

Now the resistor part...can someone help me out on that please?
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Old 07-30-2010
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The resistor is under the hood next to the HVAC blower in the plenum on the passenger side firewall. It has a 4-wire connector and is held in by 2 screws. A replacement costs about $10~20.
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Old 07-30-2010
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Quote:
Originally Posted by rwenzing View Post
The resistor is under the hood next to the HVAC blower in the plenum on the passenger side firewall. It has a 4-wire connector and is held in by 2 screws. A replacement costs about $10~20.
The Master has spoken.
I was told or read on this site to use individual wire lugs for each connection and use Heat Shrink (adhesive inside type) over each one, after making sure the new connections work then shrink the tubing. This eliminates the connector and possible bad connections in the future, add a little bit (not much) of conductive paste to each connection before pushing on the Lug.
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  #17  
Old 08-02-2010
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just replaced the resistor and all is well! thanks guys for the help!
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  #18  
Old 08-07-2010
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A/C Fan has stopped working on 87 Ranger and I can not locate Resistor. Fan went from 4 speeds working fine to only Highest speed and now Will not work at all. Chat a few days ago made it sound as though newer models have the Resistor in a different location. I opened and cleaned switch and seems OK. Thanks in Advance. Mike
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