capebreton123

hi i have a 01 honda civic and the blower motor recently all of a sudden stopped working on me, it does not work at all with the switch but when i jump the motor directly to a battery it works, i took the transistor out and did some tests i found on the internet and i did them all and it tests good, also i check the fuses, any one have un idea of what could be wrong or what tests i should do? thanks!!

ezone

99% of the time the blower power transistor is faulty.


You can take it out and apart and measure the thermal fuse inside it. If the fuse is open circuit, it's bad.



Measure the blower motor amperage draw, excess amps can blow it.
Replace the pair of cabin filters too, poor airflow makes the transistor overheat..

Or sometimes they just go because it's time to go.

capebreton123

Hi Thanks for the replay I tested that transistor and it's the circuit is not open so it's fine any other ideas what about the acurall switch it self?

ezone

Disconnect the power transistor.
Turn the ignition on.
Jumper the 2 fat wires in the connector (blue/black to black), the blower fan should run. Does it?

capebreton123

Just tried jumping those 2 wires and it does not run

ezone

With the key ON: Is there B+ at the fan connector? (blue/white wire)

capebreton123

The fan works on full blast if I hook up a jumper dirictly to the motor

ezone

The motor is missing either power or ground.
Figure out which and get back to me.

capebreton123

If I put a positive on the blue/ wire it works perfect even on defferrnt speeds with the dial! Thanks a lot that realy helped now I'll just run a wire from the stereo or something and I'll be set to go!

ezone

NO NO NO!!!!
Don't be the idiot that burns his car to the ground.


Do it right

ezone

Dash fusebox, fuse 14, 10 amps

Engine compartment fusebox has the
relay for the blower
and fuse #12, 40 amps (square fuse).

ezone

Blower relay is position F
Fuse 12 is # 12

capebreton123

Ok thanks I will check those fuses

CraigW

iTrader: (1)

Grasp the blower relay case while someone else repeatedly turns fan switch on/off and you should feel an bump in relay when doing so.

drmKLRZ

Was it this test that you did with the blower transistor?