PDF associated:
/PT 42-0006.pdf
JDB0355 PT 42 0006 Application Problem Cause Solution Note Vehicles with electric windows using the following window motors 42 11 12 13 14 15 17 18 20 Replacement motor seems to be shorted right out of the box Typical 2 terminal bench testing methods create a short giving the appearance of a faulty motor Most 2 terminal or 2 wire motors are bench tested simply by applying positive and negative voltage to the respective terminals If the motor runs in any direction and draws typically less then 5 amps no load it is a good motor Because the motors listed above use the motor housing as a common ground if DC voltage is apply directly to the terminals a short results Instead for these motors battery ground is applied to the housing then 12 volts DC is applied to either terminal When that circuit is completed the motor should run continuously in one direction Now put the 12 volts to the other terminal the motor should run in the other direction Case grounded Bench Test Minimum power supply requirements 12 volts DC 5 amps This test is performed with motor out of the vehicle 1 Connect power supply ground 12 VDC to motor housing for all tests 2 Connect 12 VDC to one motor terminal the motor runs continuously in one direction 3 Disconnect 12 VDC and connect to the other motor terminal Motor now runs continuously in the other direction 4 Disconnect wires Test complete If motor passes bench test check the vehicle wiring and switch Check the window lift mechanizium for proper operation This ProTech bulletin is supplied as technical information only and is not an authorization for repair Bench Test for Case Grounded Window Lift Motors Test terminals
