FIGURE 2a
Testing for Resistor Value, Passlock I
White or Black/White
1
Black
The Passlock I
2
Key Cylinder
Yellow or Black
3
THREE-WIRE RIBBON
CABLE
MAKING CONNECTIONS
TWO-WIRE PASSKEY SYSTEM
White or Purple
1
White or Purple
The Passkey
2
Cylinder
ALL WIRES ARE
22 AWG
WIRING DIAGRAM
WIRE CONNECTION GUIDE FOR PASSKEY
RED (+) • Constant Power Input: Connect to a fused source of constant 12V.
WHITE (-) • Negative Input: Connect to a wire from the remote start system which provides
(-) ground during ignition. (WHITE wire 16 awg on relay harness)
BLUE • Resister Relay Output #87: This wire will apply the selected resistor value to the Passkey
system. Connect this wire to (small WHITE or PURPLE 20 awg) wire in the vehicle.
GREEN • Resister Relay, normally closed #87a: Connect to the ignition switch side of the (small WHITE
or PURPLE 20 awg) wire in the vehicle.
YELLOW • Resistor Relay, common #30: Connect to the small (WHITE or PURPLE 20 awg) wire facing away
from the ignition switch in the vehicle. The ORANGE and PURPLE wires are not used.
WIRE CONNECTION GUIDE FOR PASSLOCK I
RED (+) • Constant Power Input: Connect to a fused source of constant 12V.
ORANGE (-) Connect to a wire on your remote start system that supplies a (-) ground only when cranking
(Bulldog 16 awg YELLOW WITH BLACK STRIPE wire on relay harness) wire from the remote start system
which provides (-) ground only while the vehicle is cranking.
PURPLE (-) • Output to Bulb Check Wire: Connect to the 20 ga. BLACK "bulb check" wire in the ignition
switch power harness. This wire will test (-) ground when the ignition switch is turned to the
"start" position.
To Instrument
Panel Cluster
CUT
00.00
ACV
DCV
Test with the key
in the "run"
OFF
position.
COM
V
CUT
BULLDOG
MODEL 721
PURPLE (-) Output to Bulb Check Relay #85
WHITE (-) Negative Input
ORANGE Starter Input
YELLOW Module Side
GREEN Key Side
BLUE Resistance Output
RED (+) Constant Power Input
Testing for Resistor Value, Passlock II
1
The Passlock I
2
Key Cylinder
(IPC)
3
THREE 18 GA. WIRES
IN IGNITION WIRE
HARNESS
THREE-WIRE PASSLOCK I AND PASSLOCK II SYSTEMS
White or Red/White
1
VATS
Black or Orange/Black
2
Yellow (Black)
3
ALL WIRES ARE
20 AWG
FIGURE 2b
Red/White
Orange/Black
Yellow
CUT
00.00
ACV
DCV
OFF
COM
V
CUT
CUT
BULLDOG
MODEL 721
BULLDOG
MODEL 721
To Instrument
Panel Cluster
(IPC)
Test during
cranking.
To instrument
Panel Cluster
(IPC)
3
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