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© 1998 Directed Electronics, Inc. Vista, CA
N438 7/98
HARNESS 2, (+/-) DOOR LOCK OUTPUTS
This system can control two common power door lock types without any additional parts! With certain vehicles, or
if an actuator is to be installed, either a 451M Door Lock Relay Satellite or two relays will be required.
IMPORTANT! If you mistake a Type C direct-wired system for a Type A positive-pulse system, the module
will be damaged!
Type A - (+) 12V pulses from the switch to the factory relays
The system can control this type of system directly, with no additional parts. The switch will have three wires on it,
and one will test (+)12V constantly. The others will alternately pulse (+)12V when the switch is pressed to the lock
or unlock position.
If you cannot get to the switch, and you find a set of wires that pulse (+)12V alternately on lock and unlock, you
must take care to ensure that it is not a Type C direct-wire system.
Here is a test: Cut the wire which pulses (+)12V on lock, and then operate the switch to unlock.
If all doors unlock, the vehicle uses type A system.
If you lose all door lock operation in both directions, you are operating the master switch in a Type C system.
If you lose all door lock operation of one or more, but not all motors stop operating, and other doors still work, you
have cut a wire leading directly to one or more motors. You must instead find the actual wires leading to the switch.
BYPASSING SENSOR INPUTS
There are times when you need to temporarily bypass all sensor inputs to the unit, such as when remote starting
the vehicle. Anytime an auxiliary channel output is used, all inputs are bypassed for 5 seconds. During the 5 sec-
ond bypass period, ground can be supplied to the H1/6 BLUE wire without triggering the unit. When the 5 second
bypass period ends, if the unit sees ground on the H1/6 BLUE wire, all trigger inputs except the door trigger input
will remain bypassed until 5 seconds after ground is removed from the blue wire. This can be done using the sta-
tus output of a 551T remote start unit as shown below:
551T REMOTE
START UNIT
BLUE (-) STATUS
OUTPUT
TO OPTIONAL HOOD/
TRUNK PINS OR SENSORS
BLUE WIRE H1/6,
ZONE 1 INPUT
CONTROL UNIT
IN4004
DIODE
GREEN
(-) LOCK, (+) UNLOCK OUTPUT
EMPTY
UNLESS USING 451M
BLUE
(-) UNLOCK, (+) LOCK OUTPUT
H2/A
H2/B
H2/C
