Question about 1999 Chevrolet Blazer
Hi: If other windows work then it can't be FUSE. I would take off the door panel and use a 12 volt test light to see if power is getting to the front passenger door motor (make sure power control switches are attached, key on position). If power... then hot wire the window motor using a 12 volt battery to see if it works. Hook + and - wires from battery directly to the motor, reverse them to make motor go up or down. To remove door panel pop electrical control up for the front and lift out then disconnect plugs. Use 7 MM socket to remove 2 screws under where handle is located. A Phillips screw driver removes the door handle cover. Pull on door panel to pop off, whole process takes under 5 minutes. If motor works and no power to motor from drivers door then there is a broken wire in circuit or the drivers control unit is not working. NEXT... disconnect drivers door control unit and check to see which brass terminals have power (key on position), note them... then put 12 volt power from battery to a terminal from plug that was attached to the passenger door motor, using your test light check drivers door plug to see if there is power to any terminals you DID NOT MARK as having power, if power then you know the circuit is good, do this with both wires from passenger door motor plug. (A circuit tester can be used as well). If continuity then the problem is in the drivers door control unit. If no continuity then a break in the wires to the passenger door, breaks usually occur between the body A pillar and where the wires go to the door as it flexes there every time the door opens or closes. Hope this helps, rate so I know if it is worth my while helping out on here.. thanks...
Posted on May 21, 2009
Check the fuses ... first ..next get a voltmeter and probe the connections at the motor in the window while pushing up and down ... look for the voltage to change .if it changes when your opening and closing and the motor does not turn then check the connections to the motor. check all connections in this circuit
Posted on May 08, 2009
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Posted on Jan 02, 2017
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