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Heater blower quit working on all speeds

Tiny
GHOLT
  • MEMBER
  • 2004 KIA AMANTI
  • 170,000 MILES
Heater blower quit working on all speeds. Just like a 2010 question you answered. I replaced the blower transistor. Still no go. Checked voltage at transistor- OK. Switch-OK, checked voltage at blower-OK. Removed blower and hooked it up direct to DC and it works fine. Checked high speed relay-good. Fuse-good. Don't know what else to check. Any suggestions?
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Tuesday, December 18th, 2012 AT 12:44 AM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Do you have a multi meter to do some testing?If there is power at the motor then you have a bad ground feed to the motor or loose/bad connection at the connector?
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Tuesday, December 18th, 2012 AT 12:55 AM
Tiny
GHOLT
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  • 4 POSTS
Yes, I do have a multi meter and I have checked the voltage coming through the plug to the blower motor. Getting 8-12 volts depending on speed of fan selected.
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Tuesday, December 18th, 2012 AT 11:10 PM
Tiny
SATURNTECH9
  • MECHANIC
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Alright what about the ground side?Or are you measuring voltage across the two terminals?
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Wednesday, December 19th, 2012 AT 1:33 AM
Tiny
GHOLT
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  • 4 POSTS
I am measuring the voltage across pins 1 & 2. As I understand it this is the ground and positive.
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Wednesday, December 19th, 2012 AT 11:31 PM
Tiny
SATURNTECH9
  • MECHANIC
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If your getting 8-12 volts across the pins then the motor should work unless there is a bad connection some where.
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Wednesday, December 19th, 2012 AT 11:54 PM
Tiny
GHOLT
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OK, thanks. I'll have it checked out.
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Thursday, December 20th, 2012 AT 1:25 AM
Tiny
SATURNTECH9
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  • 30,869 POSTS
Your welcome keep me posted.
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Thursday, December 20th, 2012 AT 2:59 AM

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