6
2. 18 PIN HARNESS, CONTINUED
Parking Light Polarity Feed (18AWG) (WHITE/RED)
Parking Light Output (18 AWG) (WHITE)
Positive switching Parking Lights:
Locate the parking light output wire at the vehicle’s light switch.
Verification:
This wire registers positive voltage when the parking lights are turned on.
Connect the WHITE/RED wire to a 15 Amp max fused battery source.
Connect the WHITE wire to the parking light output wire at the vehicle’s light switch.
Negative switching Parking Lights:
Locate the parking light output wire at the vehicle’s light switch.
Verification:
This wire registers ground when the parking lights are turned on.
Connect the WHITE/RED wire to a good chassis ground.
Connect the WHITE wire to the parking light output wire at the vehicle’s light switch.
Vehicle Tach Signal (18 AWG) (PURPLE/WHITE)
Locate the vehicle’s ignition coil or fuel injector in the engine compartment.
Verification:
Refer to
Vehicle Wire Color and Location Chart
for the wire color and location, or test using
the following procedure:
1. Set voltmeter to AC VOLTS.
2. Attach positive lead of the volt meter to a constant 12-volt source.
3. Attach negative lead of the volt meter to the wire being tested.
4. Start the engine.
5. Have someone press on the gas pedal slightly as you monitor the meter. If connected to the correct
wire, the voltage reading will increase as the engine’s RPM increases.
Connect the PURPLE/WHITE wire to the negative side of the vehicle ignition coil or fuel injector.
Siren Output (+) (BROWN)
Locate a suitable mounting location in the engine compartment for the siren, away from moving parts.
With the bell of the siren aiming downwards, secure the siren in place using self tapping screws, being
careful not do drill into any hoses, wiring or components.
Connect the BLACK siren wire to a chassis ground using a ring terminal and self tapping screw (not
supplied).
Route the BROWN siren output wire from the control module through the firewall and connect to the RED
wire on the siren.
Note: Be sure to loom the siren wires, and seal the grommet.
