Fortress Technologies FS-20 - Manual (Page 4)

4
WIRING
GREEN WIRE: (-) NEGATIVE DOOR TRIGGER
Identify the wire that reads ground when any door is open and 12 volts when all doors are closed. Some vehicles
may have isolated door triggers. In this case you may need to run additional wires from other doors or go directly
to the wire that triggers the vehicle’s interior dome light. Sometimes newer vehicles contain a separate body
control module (BCM) where the door trigger circuit can be located. One vehicle will not require the use of BOTH
Negative and Positive door trigger wires.
VIOLET WIRE: (+) POSITIVE DOOR TRIGGER
Same as the GREEN wire above except this wire is used for vehicles that show a positive voltage (12 volts) when
the door is open and a ground when doors are closed as in many Ford, Lincoln, and Mercury vehicles.
BLACK WIRE: SYSTEM CHASSIS GROUND
The Black wire MUST be connected to the CHASSIS METAL of the vehicle. Scrape away any paint or debris
from the connection point and use a star washer to ensure a good connection. Keep the ground wire short.
YELLOW WIRE: IGNITION SWITCHED “ON” AND “START” +12 VOLTS
Connect to an IGNITION wire (or fuse in the fuse box) that shows +12 Volts when the key is in both “On” and
“Start” (WHEN CRANKING) positions.
GRAY WIRE: (-) NEGATIVE AUX REMOTE OUTPUT 1 (Optional, may require a relay)
Connect to the Negative trunk release circuit or to the activation circuit of an auxiliary module or device. If the
circuit requires +12V, then a relay is required. RELAY WIRING: Connect the Gray wire to terminal 85, connect
relay terminals 86 and 87 to +12V constant power. Connect terminal 30 of the relay to the +12V positive
device/circuit to be activated.
BLUE WIRE: (-) NEGATIVE HOOD/TRUNK TRIGGER (Optional)
Input trigger for a grounding hood or trunk pin switch. Connect to existing hood and trunk pin switches that read
ground when open. If no existing switches are available, install new pin switches if desired. Note: DO NOT
mount new pin switches in water pathways.