How To Install Power Windows

11 Before installation, insert the weather-tight plug. This plug is difficult to install once inside the door. Power comes from the Mustang's accessory circuit through any one of the female accessory plugs near the fuse box under the dash. Power windows must be protected with a 15-amp circuit breaker as fuses tend to blow due to the short-term amp draw of power windows.

12 The power unit installs as shown. Make sure the window is in the up position...

...for ease of installation. Four 10mm bolts retain the power unit.

13 To install GM switches, cut both the door and door panel. Because we're going with a gang-switch setup on the driver's door, we cut an opening sized to the switch retainer plate. Based on our experiences, we don't recommend the GM switch unless you intend to build a custom console, and you'll still have to cut sheetmetal somewhere.

14 Getting power to the motor calls for drilling in two locations: at the door-hinge boss and the A-pillar. Find the Ford dimple at the door-hinge boss and A-pillar, and drill a 5/8-inch hole for the wire harness passage. The size depends on the size conduit you use. With door courtesy-light models, run conduit where Ford did.

15 Gang switches tie into a main harness that feeds all four window locations.

16 After cutting the opening with a nibbler, clean the surfaces with a die grinder.

17 Our GM gang switch is checked for fit. The retainer clips must fit smoothly, but don't make it so that the switch is impossible to replace.

18 Wind lace is installed along the bottom to protect wires from chaffing.