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Connecting Left and Right Parking Lights using two diodes.
from the headlight switch. These cars can still be connected directly to the White wire by
finding the parking light circuit after the relay, usually at the Fuse/Junction Block.
The correct wire will show Positive 12 Volts when the headlight switch is in the "Parking
Light" and "Head Light" positions. When such a wire is located, be sure to also test that it
is non-rheostated: while metering the wire, operate the dash light dimmer control. The
correct wire will show no change in voltage when the dimmer is operated. Note: Do not
attempt to flash the parking lights by connecting the White wire to a rheostated (dimmer)
circuit! This will backfeed the parking lights through the rheostat or illumination control
module, and possibly cause damage to the vehicle or alarm control unit. Also, if the White
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Left Parking Lights
Head
Light
Switch
Right Parking Lights
10 Amp
Note: Use two
IN4006 diodes.
Control
Unit
White
wire
Power Doorlock Section
Page - 25
Power Doorlock Interface Port:
The control module has a plug-in port for
an optional doorlock interface, allowing it to operate the vehicle's existing power doorlocks.
The 3 pin port on the system's control module produces a negative pulse for locking the
doors (inside pin), a constant 12 volt pin for the optional relay coils only (center pin), and
a negative pulse for unlock (outside pin). The doorlock interface needed will depend upon
the type of power doorlocks the vehicle has.
CONNECTION:
Quick Interconnect Harnesses are available for power doorlock
applications, and provide the necessary wiring connections; each has its own detailed,
illustrated instructions. If using a universal interface, of which several models are offered,
identify the type of doorlock system and obtain the correct interface. Connections, which
are shown in the following pages, should be with proper terminals, connectors, or by
soldering and insulating with quality vinyl electrical tape or heat shrink tubing. All wiring
should be carefully routed to avoid the possibility of chaffing or otherwise being damaged.
The vast majority of power doorlocks are found as three system types: 3 wire negative
pulse, 3 wire positive pulse and 5 wire reversal, rest at ground. Other power doorlock
systems which may be encountered are the vacuum pump types found in older Mercedes
vehicles and the single wire, dual-voltage which has appeared in some late model vehicles.
The best way to identify a doorlock system is to examine the doorlock switch's wiring.
