©
2006
Directed Electronics
9
Relay Harness Wiring Instructions
H3/A BLACK/WHITE input to on-board interior light illumination relay #87
This wire determines what the output polarity of H1/4 will be. If the door pin circuit is negative,
connect to chassis ground. If the door circuit is positive, connect to a fused 12V source.
Power Door Lock Diagrams
H3/B – H3/G power door lock wires
The system has door lock relays on-board, and can directly interface with most electric power door
lock systems drawing 30 amps or less.
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The easiest way to determine what type of door lock system you are working with is to remove the
master locking switch itself, which is usually on the driver’s door or on the center console. Once you
have determined which type of factory door lock circuit you are working with and the color codes
of the switch wires to be used, you can usually simplify the installation by locating the same wires
in the vehicle’s kick panel.
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E:: The wires should be re-tested at this point to be sure they work the same at the
kick panel. If no central locking switch is found, the installation may require a door lock
actuator.
There are eight different types of common door lock circuits (some vehicles use more unusual
systems):
Type A - Three wire (+) 12 volt pulse controlling factory lock relays.
Type B - Three wire (-) ground pulse controlling factory lock relays.
Type C - Directly-wired (no factory relays) reversing-polarity switches.
Type D - Aftermarket actuator-driven systems. These include slave systems without an actuator
in the driver’s door but with factory actuators in all the other doors, since these can be controlled
with the installation of an aftermarket actuator.
Type E - Electronically-activated vacuum systems (post-1985 Mercedes-Benz and Audi). This
requires special programming of the system.
IMPORTANT!
The H3/A wire is not required for wiring the door locks. Depending on
the type of door lock system, there may be additional wires in the Door Lock Harness
(H3) that are not required used in wiring the door locks.
