The power windows in your Mazda MX6 use a simple reversible DC motor controlled by rocker switches in the door panel. Troubleshooting these types of power accessories can be a daunting task considering the numbers of wires attached to the power window switches. The task can be simplified by testing at the power window motor instead of the switch. A common automotive circuit tester (available at your local auto parts store) is all that is necessary to perform the testing procedure. This job can be completed by the average home mechanic in under an hour.
- Skill level:
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Things you need
- Automotive circuit tester
- Screwdriver set
Check the fuses in the under-dash fuse block located near the driver side kick panel. Turn the ignition key to the run position. Attach the battery clips of the circuit tester to the vehicle's battery terminals and touch the probe end to the two metal test pins on the fuses. Replace any fuse that shows power on one side and ground on the other side. A good fuse will show power on both sides of the fuse. Some fuses will show ground on both sides, or no power or ground on either side. These fuses are powered only when the circuit is turned on by an on-board computer The power window fuse on the MX6 is a 30 amp fuse located in position #7 the under-dash fuse block.
Remove the door panel by using a screwdriver to remove the screws located under the door pull cup, in the door latch trim, and around the outside edge of the panel. Remove the panel by pulling it away from the door to unsnap the panel clips and sliding it up and off the door frame. Pull the plastic moisture barrier, located behind the door panel, back to access the window motor.
Unplug the window motor located inside the door on the window regulator that the window is attached to. Turn the ignition key to the on position. Touch the probe end of the circuit tester to a pin in the wiring harness side of the connector and operate the switch while checking for power and ground. Each of the two wires in the connector should show power when the switch is moved in one direction and ground when the switch is moved in the opposite direction. If this doesn't happen, replace the switches; if it does happen, replace the motor.
Tips and warnings
- Never use a common test light to troubleshoot the electrical system on a late-model car or light truck. A common test light draws more current than an on-board computer can withstand without damaging the computer.
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