Directed Electronics 530T User Manual
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N530T 1/00
© 2000 Directed Electronics, Inc.
530T Window Automation System
The 530T window automation system controls the operation of two vehicle windows in both the up and down
directions. The 530T automatically rolls up the power windows when the security system is armed, as well as pro-
viding “one-touch” operation in either direction. The 530T can also be used to vent or roll the windows
completely down with an auxiliary channel from the security system.
Before wiring the 530T, it is important to understand how different window systems work. A 12VDC motor must
have (+)12V on one of its wires and (-) chassis ground on the other in order for it to operate. Most window
switches are connected directly to the window motor with two wires. These two wires will either rest at (-)
ground, (+)12V ignition, or sometimes they will rest open. In any of these systems, the switch, when activated,
will send (+)12V to one wire and (-) ground to the other wire. Which wire gets (+)12V and which wire gets (-)
ground determines which direction the motor will roll the window.
The three window systems will be referred to in this manual as type A, B, or C. To determine which type of system
you have, turn the ignition on, check the power window wires at the switch with a meter to see what polarity
they rest at. If they rest at (-) ground, you have a type A system. This is the most common system. If they rest
at 12V when the ignition is on, you have a type B system. This system is used on many European vehicles. If the
wires rest open, you have a type C system. The wiring for the type A and type C systems is exactly the same,
however, the type B system differs slightly.
NOTE: If the vehicle is equipped with any type of factory automatic full-travel or “one-touch”
system on the driver’s window, there may be a relay or module in the driver’s door. Be sure to interface with the wires between the module and the window motor.
Identifying Window Systems
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© 2000 Directed Electronics, Inc. N530T 1/00
Type B power window systems are common in many European cars, such as Mercedes Benz and Porsche. In the
type B system, the power window wires will rest at (+)12V ignition and the switch will switch one of the wires
to (-) ground to activate the window motor. The wire that switches to (-) ground determines which direction the
window will move. Since the 530T monitors the state of the switch wires, the switch input polarity must be set
to the (-) negative setting (see dip-switch settings). Also when testing, the UP wire is the wire that remains at
(+)12V ignition while the window is moving up; the DOWN wire is the wire that remains at (+)12V ignition while
the window is moving down. This can be confusing because the 530T switch input wires are not going to be con-
nected to the same wires as the motor output wires. Just remember, with the 530T installed, the switches are
no longer connected to the motors. They trigger the 530T to move the power windows one direction or the other.
NOTE: When wiring the 530T in a vehicle with a type B system, it is necessary to run the wires into
each door to be controlled by the 530T. If not, the master (driver’s door) switch will work, but the
switches in the other doors will not.
Type A or Type C Windows
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N530T 1/00
© 2000 Directed Electronics, Inc.
Some window systems use either a central control module, or control modules in each door. These systems are
less common than direct wired systems. These can be found in many newer Volkswagens, BMWs, Isuzus, Maximas
and Grand Cherokees. If the vehicle has one of these systems, the 530T must be interfaced between the module(s)
and the window motor(s). This often requires the wires to be run into each door. The 530T monitors the AC
“noise” generated by the motion of the motor. For this reason the 530T cannot drive relays or control modules
in the system.
Type B Windows
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