The first power windows debuted in 1940, included as a part of the Packard 180 series. This first power assist system was hydro-electric, and it was developed to provide a way to move convertible tops up and down with ease. Other systems followed, including ones that operated on a central hydraulic pump and ones incorporating a vacuum system, but these could not produce the power needed to operate more intricate convertible tops with four side windows rather than two. The first system to include power windows, power seats, and power convertible top control was known as the Hydro-Letric power system, and it debuted in 1947.
Power windows have come a long way since then, and, today, they operate on an electrical system. Power is distributed to the driver’s door through a circuit breaker; in contrast, on the passengers' doors the power is distributed through a lockout switch which then connects to a switch on each of the doors. When someone presses one of these switches to open the power window, one of the contacts connects to a center power contact. The second contact stays grounded. When the switch is pressed in the opposite direction, the window closes, and power runs in the opposite direction. This system uses power from the motor of the vehicle to operate.
Once, drivers had to buy a car that came with power windows as an option in order to enjoy this convenience. But since the lifting mechanism used in power windows is much the same as that used in manual windows, power windows kits have been developed that will convert any manual window into a power window. Power window kits come with everything someone needs to install it, including motors, buttons for window control, all necessary wiring and hardware, and instructions to ensure quick installation.
SPAL Power Window Kits
Today, it is possible for just about any car to have power windows, thanks to power window conversion kits. For a great selection of these kits to purchase, including SPAL kits, visit SlickCar.com. The SlickCar.com site has everything drivers need to convert their manual windows to power windows.
Adding power windows to your car or truck has never been easier. The SPAL power window kits are designed to convert your manual roll up windows to power. This is achieved by a cable driven transmission and motor setup. The Motor is controlled by the switches then the motor spins the transmission via the cable. The cable is designed to be flexible so it will fit any make and model car or truck produced. All of the Power window kits listed on this page have spline adapters to fit your manual window regulator splines. The splines for the power window kit is then covered by the included door cover and the door cover can be painted to match your interior or left in the factory black color.
SPAL has been producing power window conversion kits for over 20 years and is known as the industry leader. They offer a standard power window kit and a deluxe kit. The Deluxe kit is rated at a higher torque rating for larger (heavier) windows. SPAL also offers a complete line of power window switch kits that will fit the taste of any user or car customizer.