Mercedes Door Lock Activation
Door Lock
Switch
Unlock
Lock
B+
87
87A
85
86
30
87
87A
85
86
+
+
+
To +12 Volts
(B)
Door Lock
Compressor
Cut
Green Wire
Unlock
Lock
Black 3-Pin
Mini Connector
Green Wire: Lock
Blue Wire: Unlock
Unlock Driver's Door First for 3-Wire Negative Door Lock Systems
87
87A
85
86
30
Unlock Wire
Passenger's Door
Lock
Unlock
To +12V or Ground
To +12V or Ground
Driver's Door
Rear Doors
Passenger's
Door Switch
Door Lock Relay
Control Module
Lock
Unlock
+12V
ALA984H
Relay
Driver's Door
Switch
Cut
Blue Wire
Green Wire
Light Blue Wire
HC3: Black 3-Pin Door Lock Harness
(continued)
Unlock Driver's Door First Wiring for 3-Wire Positive Door Lock System
87
87A
85
86
30
To +12 Volts
(B)
To Power Door
Lock Switch
Lock/Unlock Wires
Lock
Unlock
87
87A
85
86
30
+ Unlock
Cut
Driver's
Door Motor
Black 3-Pin
Mini Connector
Green Wire
Blue Wire
Light Blue Wire
Wiring
(continued)
11