Step 1: 10-Pin Main Harness Installation
The main wire harness contains 8 wires which all have a specific purpose.
Follow the wiring recommendations enclosed for each wire. Wires not used
should be released from the harness connector or taped off to prevent accidental
shorting.
Gray Wire: The gray wire is a pulsed ground output designed to activate the
vehicle’s existing car horn system in place of or in addition to a siren
sounding device. Connect the gray wire to the negative trigger wire on the
vehicle’s horn relay.
WARNING! Maximum output of this wire is 300mA. Horn systems requiring
positive voltage or more than 300mA to trigger the horn relay will require an
additional relay to increase current capabilities.
Blue Wire with White Stripe: This wire provides a single pulsed ground when
the 7921P is disarmed so that it will disarm a factory installed alarm system.
Note: Some factory alarms systems may require a double pulse signal to
disarm the factory alarm system. In this case, you will need to add Silencer
adapter model #5902DP to the blue wire with white stripe.
Brown Wire: The brown wire is the positive siren output wire. Connect the
brown wire from the harness to the brown wire on the siren supplied. Ground
the remaining black wire from the siren.
Blue Wire: The blue wire is a negative trigger input that can be used for existing
or newly installed grounding type hood/trunk/ hatch pin switches. The blue
wire can also be used as an input for additional ground output electronic
sensors.
Green Wire: The green wire is the negative (-) door trigger input. If the vehicle
you are working on has a negative (-) triggered dome light system, connect
the green wire to the common dome light trigger wire. This wire is usually
located at the driver’s side door jamb switch.
Violet Wire: The violet wire is the positive (+) door trigger input. If the vehicle
you are working on has a positive (+) triggered dome light system, connect
the violet wire to the common dome light trigger wire. This wire is usually
located at the driver’s side door jamb switch.
Red Wire with White Stripe: The red/white wire is the output of the parking light
relay. Connect the red/white wire to the parking light trigger wire coming from
the headlight switch. Do not connect the red/white wire to a dashboard
lighting wire. Connecting the red/white into dashboard lighting can damage
the dashboard lighting dimmer switch.
Pink Wire: The pink wire is the input wire to the parking light relay. The
connection of the pink wire determines the output polarity of the parking light
relay. If the parking light system you are connecting to is positive activation,
connect the pink wire to b12vdc. If the parking light system you are
connecting to is negative activation, connect the pink wire the the frame of
the vehicle.
Note: (Applies to All Models) The main 10 pin harness contains two vacant
sockets. These vacant sockets are for channel #2 output. All the alarm
modules require an 5912 for channel #2 operation. Follow the wiring
instructions supplied with 5912. If a 5912 relay is not available, a standard
Bosch 5 pin relay can be used.
Step 2: Arm / Disarm Harness Wiring (3-Pin White Socket)
Follow wiring diagram enclosed for proper connection to the factory installed
power door locking system to arm and disarm the 7921P security system.
Step 3: 5-Pin Power Harness Installation
The power harness contains 3 wires and two vacant sockets, this power harness
does not come packaged with the alarm module but in 5901H1, 5901H2,
5901H3 harness kits or custom starter disable/power interface harnesses.
Packaged with the 10-pin main harness are two loose wires (an Orange wire and
a White wire with a Black stripe). Follow the wiring recommendations enclosed
for each wire.
Orange Wire: Insert the orange wire into the first socket of the power harness.
The orange wire is the dome light supervision control output. Connect the
orange wire to the required control relay.
White Wire with Black Stripe: Insert the white/black wire into the third socket of
the power harness. (As shown) The white/black wire is the (-) Channel #2
output wire and should be connected to an existing (-) activated trunk
release switch or an additional relay will have to be added to control the
trunk release mechanism.
Step 4:Door Lock/Unlock Socket (3- Pin Black Socket)
For remote controlled door lock/unlock operation, follow the wiring diagram
enclosed (page 2). The harness is an optional part not supplied with 7921P.
Order part # 5902 or 5903 for one-wire multiplexing door locking systems.
Step 5: Auxiliary Interrupt Wiring (2-Pin Orange Socket)
To interrupt an additional circuit(s), all alarm modules require either the ALA-
RPS, ALA-RPS2 or ALA-RPS3 relay pack. Follow the wiring instructions
supplied with the relay packs.
Step 6: Dip Switch Feature Programming
Dip Switch #1: Ignition Key Controlled Lock/Unlock (Door lock control function
must be connected and the door lock output feature must be “On” in the
dealer mode)
Note: This feature can be programmed using the #1 Dip Switch in both the
dealer and consumer modes.
Place Dip Switch #1 to the “On” position to activate this feature.
Place Dip Switch #1 in the “Off” position to deactivate this feature.
Dip Switch #2: Current Sensing
Note: This feature can be programmed using the #2 Dip Switch in both the
dealer and consumer modes.
Place Dip Switch #2 to the “On” position to have the current sensing feature on.
Place Dip Switch #2 in the “Off” position to have the current sensing feature off.
Dip Switch #3: Door Entry Delay
Note: This feature can be pre-programmed in dealer mode using the #3 Dip
Switch. The feature will not be functional in the dealer mode but will become
functional when the unit is converted to customer mode.
Place the dip switch in the "On" position. During customer mode operation,
the (+) or (-) door input trigger wires will have a 20 second entry delay. This
is primarily used for Ford vehicles that have keyless entry and use a door
mounted keypad.
Place the dip switch in the "Off" position (Factory Default) and the 20 second
door entry delay will be off (Instant Activation).
Step 7: Additional Menu Programming
The Silencer model 7921P control module offers additional menu programmable
features. Follow the dealer or consumer remote feature programming sheets to
adjust the 7921P features.
I N S TA L L AT I O N I N S T R U C T I O N S
Model: 7921P
For Technical Assistance Call:
(800) 638-3600
Proposed
© 2005 Copyright Magnadyne Corp.
1111 West Victoria Street
Compton, CA 90220
www.magnadyne.com
Power Harness
First Socket (-) Domelight control output
Second Socket (+) 12 volts for the relay
Vacant Sockets
Main Harness
+12 Volts for Relay
(when needed)
(-) Channel #2 Output
