Blower motor not working

Tiny
MARTIN_092282
  • MEMBER
  • 2002 HONDA CRV
Air Conditioning problem
2002 Honda CRV Four Wheel Drive Automatic

My 2002 Honda CRV is the best, but I cant find out whats wrong with the ac/heater, 1 day it was blowing and working but the next it wasn't, so I have done a lot of elimination like its not a fuse, or relay. When you turn on the car and then the ac knob on the fan kicks on but then right off, could that be the problem. I also know the fan works because my dad hooked up a battery to it and it works just fine. My dad thinks its the knobs that are in the car that are broken. I have tried the knobs and it don't matter what speed I put it on it does not work. But when im going fast air comes out of the vents not a lot but still, if I turn it to hot it gets hot if I turn it to cold its not cold but cool. I have look bin looking different things on the net and haven't seen anything that it could be.
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Tuesday, October 27th, 2009 AT 11:20 AM

5 Replies

Tiny
KHLOW2008
  • EXPERT
The fan blower motor is not working and you need to find out why.

See if the following is of any help.

A Problem in the Blower Motor Circuit

1 . Check the No. 12 (40A) fuse in the under-hood fuse/relay box, and the No. 14 (10A) fuse in the under-dash fuse/relay box.
Are the fuses OK ?
YES - Go to step 2.
NO - Replace the fuse(s), and recheck.

2 . Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig23_1.jpg



3 . Turn the ignition switch ON (II).
Does the blower motor run?
YES - Go to step 4.
NO - Go to step 17 .

4 . Turn the ignition switch OFF.
5 . Disconnect the jumper wire.
6 . Disconnect the power transistor 4P connector.
7 . Check for continuity between the No. 2 terminal of the power transistor 4P connector and body ground.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig24_1.jpg



Is there continuity?
YES - Go to step 8.
NO - Check for an open in the wire between the power transistor and body ground.

8 . If the wire is OK, check for poor ground at G501. Connect the No. 2 and No. 4 terminals of the power transistor 4P connector with a jumper wire.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig25_1.jpg



9 . Turn the ignition switch ON (II).
Does the blower motor run at high speed?
YES - Go to step 10.
NO - Repair open in the wire between the power transistor and the blower motor.

10 . Turn the ignition switch OFF.
11 . Disconnect the jumper wire.
12 . Disconnect the heater control panel 30P connector.
13 . Check for continuity between the No. 16 and No. 17 terminals of the heater control panel 30P connector and body ground individually.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig26_1.jpg



Is there continuity?
YES - Repair any short to body ground in the wire(s) between the heater control panel and the power transistor.
NO - Go to step 14.

14 . Check the continuity between the following terminals of the heater control panel 30P connector and the power transistor 4P connector.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig26a_1.jpg




http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig27_1.jpg



Is there continuity?
YES - Go to step 15.
NO - Repair any open in the wire(s) between the heater control panel and the power transistor.

15 . Reconnect the heater control panel 30P connector.
16. Test the power transistor (see Power Transistor Test ).
Is the power transistor OK ?
YES - Check for loose wires or poor connections at the heater control panel 30P connector and at the power transistor 4P connector. If the connections are good, substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.
NO - Replace the power transistor.

17 . Disconnect the jumper wire.
18 . Disconnect the blower motor 2P connector.
19 . Measure the voltage between the No. 1 terminal of the blower motor 2P connector and body ground.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig28_1.jpg



Is there battery voltage?
YES - Replace the blower motor.
NO - Go to step

20. Turn the ignition switch OFF.
21. Remove the blower motor relay from the under-hood fuse/relay box, and test it.
Is the relay OK?
YES - Go to step 22.
NO - Replace the blower motor relay.

22 . Measure the voltage between the No. 3 terminal of the blower motor relay 4P socket and body ground.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig29_1.jpg



Is there battery voltage?
YES - Go to step 23.
NO - Replace the under-hood fuse/relay box.

23 . Turn the ignition switch ON (II).
24. Measure the voltage between the No. 2 terminal of the blower motor relay 4P socket and body ground.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig30_1.jpg



Is there battery voltage?
YES - Go to step 25.
NO - Repair open in the wire between the No. 14 fuse in the under-dash fuse/relay box and the blower motor relay.

25 . Turn the ignition switch OFF.
26 . Check for continuity between the No. 1 terminal of the blower motor relay 4P socket and body ground.


http://www.2carpros.com/forum/automotive_pictures/192750_BlowerMotor02CRVFig31_1.jpg



Is there continuity?
YES - Repair open in the BLU/WHT wire between the blower motor relay and the blower motor.
NO - Check for an open in the wire between the blower motor relay and body ground. If the wire is OK, check for poor ground at G301.

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Wednesday, November 4th, 2009 AT 9:23 AM
Tiny
BAMMELTON
  • MEMBER
  • 2002 HONDA CRV
2002 Honda CRV 4 cyl 140000 miles

fan blower stop working, for the heat and air. Pulled out the fan wired it up it work fine look at the on and off swith wireing was find
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Tuesday, December 26th, 2017 AT 2:42 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi bammelton,

Refer to the following post for procedures how to trouble shoot the problem.

http://www.2carpros.com/forum/2002-honda-crv-ac-and-heater-dont-work-vt364760.html
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Tuesday, December 26th, 2017 AT 2:42 PM (Merged)
Tiny
CONNIE T
  • MEMBER
  • 2002 HONDA CRV
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 86,000 MILES
Air Conditioning problem
2002 Honda CRV 4 cyl All Wheel Drive Automatic 86000 miles

The Fan does not work either on the AC or the heater. I check the fuses both under the hood (left side engine area) and under the dash (right side steering column. All fuses were good. I was told to rap on the blower motor to see if it would start.
Where is the Blower Motor located? Do you have any other T/S recommendations?
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Tuesday, December 26th, 2017 AT 2:42 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
The blower motor is below the right side of dash on AC blower unit. Check the blower motor relay too.


http://www.2carpros.com/forum/automotive_pictures/12900_blower_18.jpg

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Tuesday, December 26th, 2017 AT 2:42 PM (Merged)

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