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Friday, July 15, 2022

Aftermarket Keyless Entry for most any 911 equipped with central locking!

 




Since the 911 with the Central Locking feature already has door lock actuators adding remote entry fobs to these cars is exceedingly easy.

Please read this entire document before moving forward with this installation.

 Any Remote Entry Fob kit available on Amazon or other sources includes features such as an alarm that can be used. None of these additional features need to be implemented for installing remote entry, greatly reducing the complexity of the installation. Since the remote fob feature-only installation does not interfere with any other system in the car including an old dead or unused alarm/fob system nothing in the car needs to be modified/disabled or removed to install this update.

All these kits can be configured in various ways so read the instructions with the kit purchased.

For all these kits there are usually only 4 wires connections that need to be made for Remote Entry:

  • A ground wire to a chassis ground;
  • Two wires one each to be attached to each side of the central locking rocker switch on the console;
  • A constant hot wire to the battery, easily obtained running to the radio Block A Pin 4: +12Vconstant (red). If you plan to put the remote fob control module under a seat the alternate constant hot wire can be picked up there. See the below section on this. Also here is a page discussing how to remove a seat without drama
Other aspects of the installation:
  • There may be some dipswitch or other configuring of the kit to make the installation operate correctly.
  • When placing the control module's antenna wire consider positioning it so its radio reception is maximized. The factory runs the wire antenna up the "A" pillar. That is the windshield frame on the driver's side of the car.

If the plan is to place the Remote Entry control module under a seat:

The heated seat circuit uses an easily accessible connection point. Its under-seat connection plug is designed to be disassembled to add a wire soldered to Pin "2". This pin is the hot (+) pin for heated seats internal to the seat's connection plug. When soldering to the pin, completely remove it from the plug housing to avoid melting the plug during soldering.

On my 1996 USA Left-Hand Drive Carrera, this approach uses fuse #25 in the fuse box in the frunk. The fuse is likely already present even if the heated seat option is not installed in your car.  

WARNING the above information about fuse location in the fuse box may be different for Right Hand Drive cars and cars delivered to countries other than the USA so for cars delivered outside the US check the label in the fuse box on the specific car.



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