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    Michaelrt1954's Avatar
    Michaelrt1954 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 23, 2011, 02:45 PM
    2003 Honda Accord AC Blower Motor quit
    The blower motor in my 2003 Honda Accord suddenly quit working. I replaced the motor with no help.
    There are 12VDC going to the motor and the fuses are good. Any thoughts?
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #2

    Jul 24, 2011, 05:11 AM

    Power at the blower is one side of the equation. The ground or "control side" is the other.
    That is controlled by the blower power transistor.
    The blower power transistor controls the blower motor in all speeds except HIGH. The blower power transistor is controlled by the heater control panel. When the heater control panel requests HIGH blower speed, the blower power transistor grounds the blower motor, which connects the blower motor directly to ground, making the blower run at high speed.

    Here's the schematic:

    Name: 1a.jpg Views: 3186 Size: 89.8 KB

    And here's the location:

    Name: 1aa.jpg Views: 8635 Size: 110.2 KB
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