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Resistor to blower?

Tiny
K10394
  • MEMBER
  • 2001 LINCOLN TOWN CAR
Blower motor working with power but no air blowing. I hit the resistor. The air started coming out, now do I change that darn resistor. Wow. It seems like it would be a lot of work. Its hard to get to. Do I change it or keep tapping it? Is it just going bad?
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Tuesday, October 5th, 2010 AT 8:28 PM

27 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
If tapping it caused it to work again then its either failing or the wiring to it is loose or damaged, either way something will need replaced because it will only get worse.
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Friday, October 15th, 2010 AT 6:09 PM
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
  • 1999 LINCOLN TOWN CAR
Heater problem
1999 Lincoln Town Car V8 Two Wheel Drive alot miles

these are limos and we are going threw blower motors on a 1999,2000, and a 2001. Replaced them with after market ones and it seems as if we are not getting the right speed out of them. Do these cars have blower resistors? Thanks
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
If you have manual heating, then yes they have resistors.

If you have auto heating, then they have a power amplifier control unit
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
[do these go bad and how do you replace them?
Easy? Thanks
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
You didn't answer my question so I dont know how to respond.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
How can you tell if has auto heat. These have auto options and manual? Comfuse
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
TOM RICHARDSON
  • MEMBER
  • 3 POSTS
  • 1999 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
The blower motor was intermittant. Now it doesn't work on heat or A/C. I assumed the motor was bad, but I jumped it to the battery first and it works fine.
I checked the power lead to the blower and find 5 v on high setting. When I have someone press the control for slower fan speed, the volts drop about 1 volt each time. I can't find a book for my year Towncar. I do have a manual for 87 to 97. It talks about checking the blower motor resistors and shows a picture, on the older ones being on the fire wall. I couldn't find any.
Could the probem be in the control module on the dash? Or. Could I have a loose connection? Either in a wiring connection or onto the control module itself?
Would that be likley to cause a voltage drop to 5 volts and why it was intermittant?
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
If the heater control head has an AUTO option, and you can just set it to whatever temp you want, then it has auto heat.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi Tom Richardson, Welcome to 2carpros and TY for the donation

Your probable causes here could be the blower motor speed controller or the electronic automatic temperature control module behind center of dash


https://www.2carpros.com/forum/automotive_pictures/12900_b1_14.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_b2_14.jpg

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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
Well if has auto heat and the blower is only blowing partially. New blower 2nd this year. What would keep it from running full speed? Thanks for all your help this has been a nightmare MARK
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
TOM RICHARDSON
  • MEMBER
  • 3 POSTS
Thanks Rasmataz!
I still haven't resolved the problem on the blower motor issue. I did replace the electronic temperature contriol module in the center of the dash, to no avail!
Where do I find the blower motor speed controller?
Also, bear in mind. I get a 5 Volt reading from the pigtail that goes to the blower motor when the fan is on high, as the temp is selected lower, the voltage drops about 1 volt each time. The blower runs fine when jumped to the battery.
Also, is there a blower motor resistor in this year vehicle?
Before it quit entirely, the blower was intermittent.
Thanks for your help!
PS I imagine the intermittant running of the blower could be that it ran somewhat on the lower voltage sometimes.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
We have now determined that you do have auto heat in these cars.

So we know which troubleshooting flowchart to follow.
But it's 1am here. And i'm going to bed.

I'll start digging back in to this around 9 PM tomorrow.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The blower motor speed controller is in right rear of engine compartment on evaporator. Note: the speed controller takes the place of the blower resistor.

Notes

REMOVAL


https://www.2carpros.com/forum/automotive_pictures/12900_b1_3.gif



Disconnect the wire harness connector.
Drain the cooling system below the heater hoses.


https://www.2carpros.com/forum/automotive_pictures/12900_b2_1.gif



Disconnect the heater hose.


https://www.2carpros.com/forum/automotive_pictures/12900_b3_2.gif



4 Remove the screws and remove the blower motor speed Control.

https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
INDYCC
  • MEMBER
  • 6 POSTS
Thanks late here as well and I will check back. Hope you have a good day! MARK
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
TOM RICHARDSON
  • MEMBER
  • 3 POSTS
Thanks
Question before I start.
Does the blower motor speed controll sit in an air plenum? Or is it in the coolant?
So. Is it necessary for the coolant to be drained down to change the ms control?
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Test K part 1
turn ignition to run position (engine off)
Press MAX AC button.
Adjust EATC panel blower speed to midway between high and low speed.
Verify the the motor is blowing.
ADjust EATC panel plower speed setting to high.
If the motor speed increases with the setting changes, the system is operation normally. If blower speed does not change properly, we'll do the next test.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
That is what alldata auto references for removal procedures I've never done one on this vehicle-sorry
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Any news?
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)
Tiny
LOONEYLOOMIS
  • MEMBER
  • 3 POSTS
  • 1999 LINCOLN TOWN CAR
Heater problem
1999 Lincoln Town Car V8 Two Wheel Drive

About a week after I got my car I hit some bumps and my fan went out, kicked back in and then out again. The blower motor was tested when taken out of the car and it worked fine. The car produces AC/Heat just fine but will not blow it out on eather setting (bi-level, dash vents, etc.) Or speed, totally dead. I have been told the blower motor resistor is a very common problem. I just want to ask anybody on here!

Even with the blower motor having tested out good after the problem occured. I did put another one in after everything went south on me, this is why I thought it was ok. I have also heard a possible bad ground wire.
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Tuesday, June 23rd, 2020 AT 2:18 PM (Merged)

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