TYPE #3: 5-WIRE REVERSING POLARITY TYPE
(CONTINUED)
Once You Have Determined This We Can Start.........
1) CUT The LOCK Wire. At This Time You Will Have 2 Halves Of The Wire.
2) Press BOTH The Lock And Unlock Button. If You Have Cut The Correct Wire The Door Locking System Should NOT
OPERATE At All (The Doors Should NOT Lock Or Unlock).
NOTE:
If The System Still Operates In Either Direction (Lock Or Unlock) You Have Either Cut The WRONG Wire
Or This Is Not A Reversing Polarity System).
3) Next We Need To Figure Out Which Side Of The Cut Wire Is Coming From The Door Lock SWITCH And Which Side Is
Going To The Actual MOTORS (THIS IS VERY VERY IMPORTANT). Once You Have Confirmed That This Is Truly A
Reversing Polarity System And That You Have Cut The Correct LOCK Wire PRESS & HOLD THE LOCK Button Down
(MAKE SURE THAT YOU ARE PRESSING DOWN THE LOCK BUTTON NOT THE UNLOCK).
• The SWITCH Side Will Be The One That Shows (+)12 Volt Positive When Pressing The “LOCK “ Button (This Will
ONLY Be True If You Have Cut The LOCK Wire). NOW Connect The SWITCH Side Of The Cut LOCK Wire To Terminal
#87A On The LOCK Relay.
• The Other Side Of The CUT LOCK WIRE Will Be The MOTOR Side. NOW Connect The MOTOR Side Of The Cut
LOCK Wire To Terminal #30 On The LOCK Relay.
4) Next CUT The UNLOCK Wire. This Will Be The Wire That Shows (+)12 Volt Positive While Pressing The “UNLOCK” Button.
NOTE:
After CUTTING The UNLOCK Wire The Entire Locking System Should NOT Operate In Either Direction.
5) REPEAT The Procedure Of Finding Which Side Is The SWITCH Side And Which Side Is The MOTOR Side. ALWAYS
Connect The SWITCH Side To Terminal #87A On The Relay (In This Case The UNLOCK Relay). Always Connect The
MOTOR Side To Terminal #30 On The Relay (In This Case The UNLOCK Relay).
****THE DOOR LOCKING SYSTEM SHOULD NOW OPERATE NORMALLY****
Follow The Diagram For The Rest Of The Connections:
P.17
8008_inst.7/7/04.qx
ALARM
BLUE(UNLOCK) (-)
GREEN
(LOCK)
(-)
SWITCH SIDE OF
LOCK WIRE
MOTOR SIDE OF
LOCK WIRE
87
87A
85
86
30
(+) CONSTANT 12 VOLTS
USE 3.5 AMP FUSE
87
87A
85
86
30
(+) CONSTANT 12 VOLTS
USE 3.5 AMP FUSE
CONSTANT (+) 12 VOLTS
FUSE EACH AT 10 AMPS
(+)
CONSTANT (+) 12 VOLTS
FUSE EACH AT 10 AMPS
(+)
SWITCH SIDE OF
UNLOCK WIRE
MOTOR SIDE OF
UNLOCK WIRE
5-WIRE REVERSING POLARITY
(REST AT GROUND)
TYPE #4: VACUUM OPERATED TYPE
This Type Of System Uses A COMPRESSOR To LOCK And UNLOCK The Vehicle’s Doors. Depending On What Signal The
Compressor Receives From The Actual Door Lock Motors It Will Either PULL or PUSH The Motors.
The COMPRESSOR CONTROLLING WIRE Must Be Located And CUT.
******************** WARNING ***************************
IT IS OF SUPREME IMPORTANCE THAT THE SWITCH SIDE AND THE COMPRESSOR SIDE OF THE WIRE BE NOTED.
REVERSING THE SIDES OF THE COMPRESSOR CONTROLLING WIRE CAN PERMANENTLY DAMAGE THE COMPRESSOR.
******************** WARNING ****************************
DO NOT PROBE THIS WIRE WITH A TEST LIGHT OR DAMAGE MAY OCCUR TO THE VEHICLE. IF NECESSARY USE
A VOLT-METER.
NOTE:
For Most Mercedes Benz The Compressor Construing Wire Will Either Be A GREEN Or A BLUE Wire Located
In The Vehicle’s KICK PANELS. This Wire Will Show (+)12 Volts Positive When The Doors Are UNLOCKED And Will
Show (-)Negative Ground When The Doors LOCK.
Test Wire Doors Unlocked Only. Compressor Side Will Lock With (-) Ground And Unlock With (+) 12 Volts.
Summary of Contents for 8008-04
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