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Benz Factory Bypass & Vacuum Locks

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=46611
Printed Date: July 14, 2025 at 4:16 AM


Topic: Benz Factory Bypass & Vacuum Locks

Posted By: Trav3D1
Subject: Benz Factory Bypass & Vacuum Locks
Date Posted: January 01, 2005 at 9:37 PM

I'm installing a Mannix R/S on a 1996 C 280.

Could someone provide me with the wire color and location for the factory bypass wire?  It's my understanding that I can send a ground to this wire to bypass the factory alarm.  .....Please advise

Secondly, I used the relay specs below and the WHITE/ green wire in the passenger side running board.

Lock Relay........85 - lock wire from alarm, 86 - 12v  fused, 87 - ground, 87(a) - control wire in car (WHITE/ green wire of vehicle), 30 - 87(a) - of unlock relay

Unlock Relay........85 - unlock wire from alarm, 86 - 12v fused, 87 - 12v fused, 87(a) - 30 of lock relay, 30 - electric vacuum pump (WHITE/ green wire of vehicle)

The application above did not work, and now the lock/unlock switch inside the vehicle does not work.  I check all the fuses......Please advise.



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Trav



Replies:

Posted By: KarTuneMan
Date Posted: January 01, 2005 at 10:58 PM
12volts red   +  ignition harness
Notes: Ignition harness accessible at bottom of fusebox. Pull fusebox up into cowling area to get at wires. Use PURPLE / green to bypass factory starter kill for remote start.
Starter purple   +  ignition harness
Notes: Ignition harness accessible at bottom of fusebox. Pull fusebox up into cowling area to get at wires. Use PURPLE / green to bypass factory starter kill for remote start.
Second Starter     
Ignition pink/red   +  ignition harness
Notes: Ignition harness accessible at bottom of fusebox. Pull fusebox up into cowling area to get at wires. Use PURPLE / green to bypass factory starter kill for remote start.
Second Ignition pink/grn (2nd acc.)   +  ignition harness
Notes: Ignition harness accessible at bottom of fusebox. Pull fusebox up into cowling area to get at wires. Use PURPLE / green to bypass factory starter kill for remote start.
Third Ignition     
Accessory pink / YELLOW   +  ignition harness
Notes: Ignition harness accessible at bottom of fusebox. Pull fusebox up into cowling area to get at wires. Use PURPLE / green to bypass factory starter kill for remote start.
Second Accessory     
Keysense     
Power Lock black   -  either kick
Notes: Operates with normal one second ground pulse. These wires also trigger a factory starter kill on the base model cars w/o alarm system. Ignition controlled locking will cause a no-start problem because of this. The PURPLE / brown wire at the door lock pump located in right rear corner of trunk must be grounded for vehicle to start. There is also a single WHITE/ green wire at the dash mounted door lock switch that does not engage the starter kill. It can be located along the passenger side of the console under carpet. Type E but 1 second pulse will operate. May not operate locks at all times - test before connecting.
Power Unlock blue   -  either kick
Notes: Operates with normal one second ground pulse. These wires also trigger a factory starter kill on the base model cars w/o alarm system. Ignition controlled locking will cause a no-start problem because of this. The PURPLE / brown wire at the door lock pump located in right rear corner of trunk must be grounded for vehicle to start. There is also a single WHITE/ green wire at the dash mounted door lock switch that does not engage the starter kill. It can be located along the passenger side of the console under carpet. Type E but 1 second pulse will operate. May not operate locks at all times - test before connecting.
Lock Motor     
Unlock Motor     
Parking Lights+ gray, gray/white    switch or below f-box
Parking Lights-     
Hazards     
Turn Signal(L)     
Turn Signal(R)     
Reverse Light     
Door Trigger brn/gry, brn/gry/yel   -  pins or fact. sec.
Notes: Brn/gry at pass. front pin catches both front doors. Brn/gry/yel picks up rear doors. Also found as BROWN / pink at pin.
Dome Supervision     
Trunk/Hatch Pin brn/yel/pur, brn/wht    at switch or light
Hood Pin BROWN / red   -  switch or fact. sec.
Trunk/Hatch Release     
Power Sliding Door     
Factory Alarm Arm same as locks    factory alarm
Notes: Factory security module in trunk (if vehicle has one). May isolate arm/disarm from locks by using relay. Windows also controlled by locking and unlocking doors with key (convenience module also in trunk).
Factory Alarm Disarm same as locks    
Disarm No Unlock     
Tachometer GREEN/ YELLOW   AC conn. left of brake ped.


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