Blower motor not working was acting up before it up and quit

Tiny
JHAMEL1
  • MEMBER
  • 1999 ACURA TL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 239,000 MILES
My fan motor was acting up before it up and quit. As I would turn up the fan the car seemed to need to draw more power until turning the fan in any setting yielded no results. Not sure if I need to replace blower motor but want to see if it can be anything else. If so can someone provide details on how to change it or run a few simple tests beforehand to ensure that it is not something else.
Thank you!
Wednesday, April 8th, 2009 AT 9:19 PM

2 Replies

Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
You'll want to start your test with a test light or volt meter at the blower motor connection. With key "on", fan switch on high. If voltage present, change the fan motor. If no voltage, check blower relay to see it it's closing. if not, check for relay coil voltage. If none, change the fan switch. If coil voltage is present, check the coil on the relay. If coil is good, check relay output to blower motor. If no output, change the relay. If you have output to blower motor, get back to me.


https://www.2carpros.com/forum/automotive_pictures/248092_acura_blower_1_1.jpg



https://www.2carpros.com/forum/automotive_pictures/248092_acura_blower_2_1.jpg



https://www.2carpros.com/forum/automotive_pictures/248092_acura_blower_circuit_1.jpg



https://www.2carpros.com/forum/automotive_pictures/248092_acura_blower_relay_1.jpg



https://www.2carpros.com/forum/automotive_pictures/248092_acura_blower_text_1.jpg

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Monday, April 26th, 2021 AT 12:03 PM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

An inoperative blower fan can be due to a bad motor, it can also be for a bar relay or wiring.
The blower motor relay is located under the driver side dash (see picture below)
Check for any corrosion or burnt pin(s).
This relay can also be tested.

Here is a helpful guide:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relay is good, using a voltmeter check for power to the blower motor harness. If there is power at the harness, then the motor is likely bad. Be sure to check for any melted connectors at the blower motor.
The blower motor is located under the passenger side dash.
To remove the blower motor first the evaporator case needs to be removed to gain access to the mounting bolts for the blower unit.
The blower unit will come out of the bottom off the passenger side dash.

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Thursday, October 28th, 2021 AT 7:44 PM

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