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Air conditioner

Tiny
RONALDHARPER50
  • MEMBER
  • 1992 OLDSMOBILE BRAVADA
  • 4.3L
  • 6 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
When I turn on the air it runs for a while then it goes off. I have to stop and lift the hood and tap on the resistor. It will only run on high.
Monday, February 12th, 2018 AT 3:01 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

Do you mean the blower motor?

Roy
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Monday, February 12th, 2018 AT 3:07 PM
Tiny
RONALDHARPER50
  • MEMBER
  • 4 POSTS
Yes I all ready tried another blower and it does the same thing
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Thursday, February 15th, 2018 AT 8:28 AM
Tiny
RONALDHARPER50
  • MEMBER
  • 4 POSTS
I 'm talking about the little silver thing in front of the blower
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Thursday, February 15th, 2018 AT 8:33 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
There is a blower resistor by the blower motor that controls the speeds. It sounds like you have changed that already. If you did, check for voltage at the wires in the lower fan speeds.
If you have voltage check the connector at the resistor and the blower motor.
If you do not check all fuses in the fuse panel for power on both side with the key on

Roy
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Thursday, February 15th, 2018 AT 8:49 AM
Tiny
RONALDHARPER50
  • MEMBER
  • 4 POSTS
The blower motor is running just not fast enough.
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Thursday, February 15th, 2018 AT 4:57 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,323 POSTS
Hello,

It sounds like you have a bad ground for the blower motor can you use a test light and with the test light grounded and the system one touch the metal housing of the blower motor to see if it lights up?

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Monday, February 19th, 2018 AT 11:43 AM

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