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2000 Other Saturn Models blower motor fan

Tiny
NCROGER
  • MEMBER
  • 2000 SATURN
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
My heater/hvac blower motor will not run. I have replaced the relay, fuse is good, replaced the resistor, still motor will not run. Tested motor directly to battery and it runs. I get 12 volt at the blower motor connection but when I plug the motor in and turn on there is no voltage. I created a second ground but the same results. I tested the voltage at the motor connection, with the fan switch off there is no voltage, in all of the speed positions I get the same 12 volt readings. I am stumped?
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Saturday, June 14th, 2008 AT 1:25 PM

6 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check switch continuity.
Low= D&B
Med-Low= D&C
Med-High= D&E
High= D&F
I will post the colors, computer problem right now!
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Saturday, June 14th, 2008 AT 1:47 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS


https://www.2carpros.com/forum/automotive_pictures/62217_AC_Switch_1.jpg

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Saturday, June 14th, 2008 AT 2:14 PM
Tiny
NCROGER
  • MEMBER
  • 4 POSTS
I left the ingnition off, disconneted the blower resistor and performed the continuity test to the resistor plug connection for each bank of wires. I did this for all of the switch settings and all came back with an open circuit except when switch was in the first on position then I got a closed circuit on the brown to yellow connection but the blower motor will not run at this`setting. What is next
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Saturday, June 14th, 2008 AT 4:21 PM
Tiny
NCROGER
  • MEMBER
  • 4 POSTS
I left the ingnition off, disconneted the blower resistor and performed the continuity test to the resistor plug connection for each bank of wires. I did this for all of the switch settings and all came back with an open circuit except when switch was in the first on position then I got a closed circuit on the brown to yellow connection but the blower motor will not run at this`setting. What is next
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Saturday, June 14th, 2008 AT 4:22 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
This test was for the fan speed switch. What is the continuity there?
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Sunday, June 15th, 2008 AT 5:47 AM
Tiny
NCROGER
  • MEMBER
  • 4 POSTS
I tried to pull the switch module out but I could not get it far enough out of the dash to test. Guess I will have to take it to the dealer.

Thanks for all your help
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Sunday, June 15th, 2008 AT 11:31 AM

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