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How to Install a Power Window Motor - Driver Side on your 1979-1993 Mustang

Installation Time

2 hours

American Muscle
Shop Parts in this Guide


Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part. If you do not have a service manual or lack the skill to install this part, it is recommended that you seek the services of a qualified technician. Pay special attention to all cautions and warnings included in the shop manual! Read and follow all instructions carefully!


Window regulators may vary in design, it will be necessary to obtain a shop manual for safe removal, installation and handling of window regulators.

IMPORTANT: Some regulator cable spools will unravel if not handled properly. Refer to Service Manual for proper removal of Motor from cable spool.

Cable style regulators require special handling for successful removal and installation of the window lift motor. These instructions will help prevent the spool from coming apart and resulting in the complete replacement of the motor/regulator assembly.

  • Remove the regulator according to the shop manual. Make sure to support the window glass in a safe manner
  • Unbolt or remove the retaining rivets holding the motor to the regulator.
  • CAREFULLY lift the motor up out of the spool since some spools will come out of the housing with the motor. HINT: use a long thin screwdriver to help separate the motor from the spool.
  • Remove the motor.
  • Reverse the procedure to install.

Scissors style regulators have an assist spring to help move the window glass. This spring is under pressure at all times. The regulator must be secured BEFORE removing the motor.
• Remove the regulator according to the shop manual. Make sure to support the window glass in a safe manner.
• BEFORE removing the motor from the regulator it will be necessary to secure the sector gear of the regulator by installing a bolt through the regulator body and the sector gear.
• Drill out any rivets or remove any bolts retaining the motor to the regulator.
• Reverse the procedure to install.

One of the three types of electrical connections will be supplied with each motor depending upon application.
• Adapters to lengthen the wires. Plug into existing wiring connector.
• Adapters to change trie connector type: Plug into existing wiring connector.
• Butt type connectors. Strip the wires and crimp, then apply heat to seal connector. NOTE: Do not leave out this step. Failure to apply heat to the shrink type connector will allow water to enter and corrosion to form. This will result in premature failure of the wiring.


Para los procedimientos especificos para su vehiculo, refierase al manual de servicio de su vehiculo. Si no tuviese el manual o la habilidad para instalar esta pieza, se recomienda obtener los servicios de un tecnico calificado. Ponga atencion especial a todas las precauciones y advertencias que se incluyen en el manual de servicio. jLea y siga todas las instrucciones cuidadosamente!


Los reguladores de ventana pueden variar de diseho. Sera necesario obtener el manual de de servicio para desmontar, instalar y manipular los reguladores de ventana.

IMPORTANTE: algunos carretes de cables de los reguladores se desenrollaran sino se manipulan apropiadamente. Para el desmontaje apropiado del motor del carrete del cable, refierase al manual de servicio.
Los reguladores tipo cable requieren manipulation especial para desmontar e instalar el motor elevador apropiadamente. Estas instrucciones le ayudaran a evitar que el carrete se desarme y se tenga que cambiar el conjunto completo de motor y regulador.
• Desmonte y regulador de acuerdo al manual de servicio. Cerciorese de sujetar el vidrio de la ventana en forma segura.
• Desemperne o saque los remaches que fijan el motor al regulador.
• Para sacar el motor del carrete, levantelo CUIDADOSAMENTE porque algunos carretes se salen del casco junto con el motor. CONSEJO: use un atornillador largo delgado para ayudar a separar el motor de carrete.
• Saque el motor.
• Para la instalacion, siga el mismo procedimiento a la inversa.

Los reguladores tipo tijera tienen un resorte que ayuda a mover el vidrio de la ventana. Este resorte esta siempre bajo presion. Debe asegurarse el regulador antes de mover el motor.
• Desmonte el regulador de acuerdo al manual de servicio, cerciorandose de sujetar el vidrio de la ventana en forma segura.
ANTES de sacar el motor del regulador, sera necesario asegurar el engranaje del sector del regulador atravesando un perno un perno en el cuerpo del regulador y en el engranaje del sector.
• Elimine los remaches taladrandolos o saque cualquier terno que fije el motor al regulador.
• Para la instalacion, siga el mismo procedimiento a la inversa.

This guide applies to Vehicle years: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993 and Submodels: Foxbody