Code Alarm CA 521 Installation Instructions Manual page 10

4. TWO PIN DOOR LOCK/UNLOCK HARNESS
Negative Lock Output (GREEN)
Negative Unlock Output (BLUE)
The door lock / unlock outputs are designed to control several different types of systems which may require
additional parts. Please review the wire and location chart to see which type of door lock system is in the
vehicle. The most common types are shown in the diagrams below.
Negative Switching:
Locate the lock / unlock wires at the vehicle's lock / unlock switch.
Verification: These wires will register ground when the lock/unlock switches are activated.
Connect the GREEN and BLUE wires shown in the diagram below.
Positive Switching:
Locate the lock / unlock wires at the vehicle's lock / unlock switch.
Verification: These wires will register positive voltage when the lock/unlock switches are activated
Connect the GREEN and BLUE wires shown in the diagram below.
Negative Switching
GREEN (-) Lock Output
Lock
Unlock
BLUE (-) Unlock Output
Reverse Polarity (5-Wire Door Locks)
Locate the lock / unlock wires at the vehicle's lock / unlock switch.
Verification: These wires will rest at ground and register positive voltage when the lock/unlock switches are
activated.
Connect the GREEN and BLUE wires shown in the diagram below. Use Code Alarm part HDRLY (an SPDT
relay, not included).
Positive Switching
Vehicle Door Lock
Lock
Control Relays
Unlock
Master Door
Lock Switch
86
Lock
Unlock
86
Vehicle Door Lock
Control Relays
Fused +12 Volt
Battery Source
87
GREEN (-) Lock Output
87a
85
30
To Door Lock
X
Actuators
Cut
Fused +12 Volt
Battery Source
87
87a BLUE (-) Unlock Output
85
30
To Door Lock
X
Actuators
Cut
10
Fused +12 Volt
Battery Souce
87
87a
GREEN (-) Lock Output
86 85
30
Fused +12 Volt
Battery Souce
87
87a
BLUE (-) Unlock Output
86 85
30