4. Use electrical tape to wrap, be sure to cover about 2 inches on either side of connection.
Secure with wire ties as shown.
3. Lay upper twisted pair of wires over right wire as shown. Bring lower twisted pair of wires
up to meet the left wire as shown.
2. Twist upper wires together, twist lower wires together as shown.
Use this method ONLY when connecting two separate wires end to end.
Wire Tie
Electrical Tape
Wire Tie
LOCATING & MAKING CONNECTIONS
4
Please see the wiring chart on our website, www.bulldogsecurity.com.
CONSTANT POWER (+12V, key in any position including off)
These wire(s) are in your vehicle’s main ignition harness, usually located on the steering column coming
from the ignition switch. Probe each wire with your test light. The correct wire(s) will show +12V when
the ignition switch is in these 5 positions (ACC-LOCK-OFF-RUN-CRANK).
1. If your vehicle has only (1) constant power wire, attach the
RED wire from the 18-pin harness and both large RED wires from
the 4-relay harness to the constant power wire in the vehicle.
2. If your vehicle has (2) constant power wires, attach the RED
wire from the 18-pin harness and (1) large RED wire from the
4-relay harness to one of these constant power wires. Then
connect the other large RED wire from the 4-relay harness to the
second constant power wire in the vehicle.
IGNITION HARNESS
UNDER DASH
IGNITION WIRE(S) (+12V in run and crank position only)
The ignition wire(s) are also located in the main harness coming from the ignition switch. Probe each
wire with your test light, the correct wire(s) will show +12V only when the ignition switch is in the
RUN AND CRANK positions only. The correct wires will not show +12V when in the OFF or ACCESSORY position.
Most Ford, GM, and Chrysler vehicles have at least (2) ignition wires. Most foreign vehicles have only
(1).
1. Strip back the YELLOW wire from the 18-pin harness and then strip back (1) of the (2) WHITE wires
from the 4-relay harness and twist both of these wires together.
2. Connect the YELLOW wire and the WHITE wire from step (1) to the ignition wire in the main harness.
If your vehicle has only (1) ignition wire, tape off the end of the second WHITE wire from the 4-
relay harness and do not use.
3. If your vehicle has (2) ignition wires, connect the second WHITE wire from the 4-relay harness to it.
4. If your vehicle has (3) ignition wires (some GMs) connect the second WHITE wire from the 4-relay
harness to both the second and third ignition wires in the vehicle.
