Central Locking



Fitting central locking

Central locking is one of the most convenient extras that can be fitted to a car. It makes it so easy to open all doors from any side of the vehicle. Get a Remote Central Locking Door lock kit and you can unlock the doors at a push of a button.

Just think at the touch of a button you could unlock your doors when you have your hands full and itís pouring with rain (general during a British summer), and in the pitch dark (for those country folk) you will truly appreciate the value of remote controlled central locking.

Central locking can be fitted to unlock the two front doors, or can go all the way, and connect up the rear door as well. Get the right kit and you can wire up your indicators to flash when opening and closing as well as flash for "car find" purposes!!!!!!!!!!!!!!

You need to decide what you want your kit to do.

1). Lock and unlock using the door key. Cheapest option but pretty pointless (unless you have a car alarm which has connection options for central locking.

2). Remote central locking, eBay prices range from £12-£20 plus P&P so shop around they all seem to do the same thing.

3). Remote central locking with car finder, eBay prices range from £24-28 plus P&P so shop around.

Also depending on whether you are just going to control the front doors or all doors think about a 2 x motor kit or a 4 x motor kit.

The kit I ended up with was 4 x remote central locking with car finder

Before you start, a few things to remember:-

Always take your permanent power for the installation from the largest power wire possible.

Always use a multimeter to determine voltages.

Always fit a fuse in the power line as close as possible to the source.

Donít connect any thing to the battery until you have completed and check your installation.

Keep the wires together, and if possible, incorporate them into the main vehicle harness.

Keep the wiring neat cable tie or tape together use the cable clips fitted to the jeep.

Take time to understand what you are doing, put the kit together away from the jeep wire it up on a bench to see what it does.

The basic kit

The basic kit fitted to my Suzuki Sami was from eBay, good price and good delivery cost. The kit consists of all the necessary hardware for a proper installation.

The whole job should take about 3 to 5 hours, depending on what doors you want connected.

The basic kit consists of:-

2 x 5-wire motors.

2 x 2-wire motors.

A wiring harness

A control module.



transfer rods


2 x Key fobs chosen when ordering

Tools and extra bits, which you also require.

Voltmeter / Multimeter.

Screwdriver - flat and Crosshead.

Cable ties

20mm grommets

20mm O/D Hose pipe

20mm hole saw.

PVC insulating tape.

Electrician's pliers

Small needle nosed pliers.

Battery drill


To Start

Using the crosshead screwdriver, remove the inner door release surround and door handle. Removing the window winder handle can be tricky, but is done by inserting a small flat screwdriver between the handle and door panel, and pushing out a small 'U' shaped clip. Once this is done, pull off the window winder handle.

Now carefully pry off the door panel, starting at the bottom. Once the door panel is off, remove the plastic sheeting, and lay it to one side, as it must be put back again later.

If you have a Soft top Jeep I would recommend lowering the front windscreen, it makes for better access to the dash board plus you donít bang your head on the door struts if you remove them.

Remove the instrument panel.

Remove the speakers if they are fitted in the drivers/passengers foot wells.

If intending to fit central locking to the rear door remove the offside seat belt reel and the offside side panel

Remove the rear doorl by carefully prying off the plastic clips.


Fitting the front door motors

Take one of the brackets, and drill a 6.5mm ľ" hole between the first and second cutouts

Screw one of the 5-wire motors to this bracket as shown

Fit the whole mechanism inside the door using the large screw that holds the window side channel in place and the hole you drilled in the bracket. Make sure that the window can wind up and down without interfering with the motor, adjust the bracket and motor accordingly. Secure the lower end of the bracket by means of a self tapping screw drilled through the door.


Fit the connecting rod, and bend it carefully to line up with the existing locking mechanism. Using the connector blocks, join the transfer rod to the locking mechanism. Install the second 5-wire motor to the other door in the same way.



Fitting the rear motor

Now remove the rear door lock mechanism.

This is done by loosening the three large screws on the side of the door, end the two screws that attach the door handle to the vehicle (one screw is located under a plastic cap). Also loosen and removed the door lock release handle/lever. Disconnect the transfer rod and slide the locking mechanism out.

While the lock mechanism is out, clean and lubricate it. Inside you will see a small coiled spring.
This spring needs to be removed using needle - nosed pliers. Once this is done, replace the locking mechanism.


Cut one of the Mounting strips in half and bend one half into an "L" shape.

Fit one of the 2-wire motors to this mounting bracket. Placing motor against the door locking mechanism and mark the position, drill, and mount. Use the other half of the Mounting strips put a slight set in it and secure as per the picture.

Bend the kit supplied transfer rod to fit between the motor and the vehicle transfer rod, and join using the connector supplied in the kit.





Cable Protection between the doors

I think this is one of the most important things to get right. Not only has it got to look neat it also has to work properly.


Locate on the wing edge in the door gap, a lozenge shaped panel drill a 20mm hole below this panel and in the center of the wing edge clean hole with a file and then rust treat. Drill a second corresponding hole in the door edge, file and then rust treat.


 Fit a 20mm grommet in the door hole and force a piece of 20mm O/D hose through it fit the other end of the hose through the wing hole, so as the door opens and close this end moves in an out. Do this on the other door. A similar arrangement was used on the rear door but I used smaller tubing.




Wiring it all up.

If you have got this far youíre doing well!

Take a brake and take time now and study the wiring loom. It may seem a large ball of spaghetti but hopefully once youíve laid it out on the ground you will see what cables go where.

The loom should start with a connector that goes into the control box with a whole bunch of wires coming from it.

Two obvious wires, Red and Black (Positive and Negative). If the Red isnít fitted with an inline fuse of 15amps then fit one, set these two aside.


There should be 2 sets of 5 wires one long and one short and 2 sets of two wires one longer than the other. The two 5 wire sets go to the front doors, the short set I fitted to the drivers door therefore it denoted the control box would fit up on the drivers foot well bulkhead right in the corner, the longer of the 5 wire sets went to the passenger door.

The longer 2 wire set goes to the rear door and the remaining wires were looped together and not used.

The route I took with the cabling was.

To run the rear cables I used the drivers sill cavity and space behind the rear offside Panel.

Once all the different sets of cables are in place it is simply a matter of connecting like colors to like colors on the door motors

Positive and negative were run through to the engine bay the negative was secured to the Earth screw which the distributor earth is connected to. The positive was terminated at the battery. The control box Ariel was fed up into the window cavity so it would be vertical when the window was raised.

Now itís time to test before you put the jeep back together.

Front door buttons should lock/unlock all doors.

Front door locks should lock/unlock all doors

Rear door can be opened from the outside using key and leaver

For soft tops rear door can be opened from inside regardless of the door being locked or not.

Remote works and locks/unlocks all doors.

Now you can put the car back together, donít forget the plastic sheet between the door and the panel if you donít, the hardboard panel will start to rot


As this kit also featured Car finding Capabilities a second smaller wiring harness was supplied. After studying the kits wiring diagram two cables were identified as having a 12v 3 second pulse which could flash the indicators when operated.

Next I studied the Jeeps wiring diagram over a beer (you have to itís the only way the diagram makes any sense). I identify the supply wires to the indicators (mine were green/yellow and green/red).

Now all that was left was to connect them!!

With the instrument panel out you will find a bundle of cables which go to the largest connector attached to the instrument panel there should be the two identified wires for the indicators (they actual supply the repeater lights on the panel).

Scotch lock the cables from the control box onto the indicator wires (I personally donít like these devices) but I could not think of a better way of splicing the cables together.

Well I do hope this helps anyone who wishes to install central locking into their Suzuki. Itís not a difficult project it just needs some thought and donít rush it. But when itís done not only will it be much easier and more convenient to lock and unlock the doors of your vehicle, but you will have added value to your vehicle if you ever want to sell it.