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Jim Grant's Tech Tips
'95
Honda Civic, Blower Motor not Working
Q:
I found out that my blower wasn't working in my ‘95
Honda Civic. I just changed my blower motor resistor and
the blower still doesn’t work. Where else should I
check to see where the problem may be?
- Kevin
A:
First
you should know that there are 2 fuses for the blower motor
on your Honda. One is a control fuse located in the under-dash
fuse & relay box. This fuse is a 7.5 amp and is labeled
fuse #13. This fuse supplies the power to the control side
of the blower motor relay which is located in the under
hood fuse & relay box. The second fuse is a 20 amp Heater
Motor fuse labeled fuse #37 in the under hood fuse &
relay box. Before electrical power can get to the blower
motor, blower resistor or blower switch, the contacts in
the blower motor relay have to be closed by the control
side of the system. Now that you know this it is easy to
understand that your inspection/diagnosis of your blower
system has to start at the fuses, both have to be good for
the blower motor to work. If you have a 12 volt test light
go to the blower motor, with the key in the on position
and the blower switch in the off position, check for power
at both wires. The ground side of the blower motor is controlled
by the switch. If the blower motor has good brushes and
armature there should be power on both wires. If you don’t
have power check the blower relay more closely. Then move
the blower switch to the high speed or 4th position. At
this point you should loose power on the black with blue
wire at the blower motor. If this happens and the blower
motor still doesn’t work then you have a bad blower
motor. If the test light stays lit then you have a bad switch
or ground for the switch. The high speed or 4th setting
bypasses the blower resistor and goes straight to ground,
gets all that other stuff out of the way. Just start from
the beginning and follow the path. Just because you can’t
see electricity doesn’t mean it’s magic.
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