Inspired by John757 on this post
, I decided to make my central locking "remote"
For very little cost and not a great deal of effort I can now lock/unlock all my doors via the supplied remotes. Its certainly not a particularly vital thing to have but I will find it handy when camping and anytime I want to load up the back.
I only did this because I already had keyed central locking.
The kit consists of an actuator ($3.50) and control unit ($14.65) - lots of these on ebay.
Only one actuator is needed, for the drivers door.
The actuator was fitted as shown with the connecting rod cut to a length and bending a loop such that it attaches to the manual lock knob, using the machine screw which holds the knob in place.
The 2 wires for the actuator (3 were not required) were run through to the cab to the control unit, which also required power which was taken from the central locking loom. The control unit was wrapped in some foam and sits in the cavity behind the lower speaker, which was removed to get to the cavity. Note that there is a metal tab inside the door which I needed to bend out of the way to mount the actuator.
I could have also wired it up to flash the indicators, activate an extra alarm or utilise the 3rd button on the remote for something (perhaps turning a work light on/off, winch control, etc...) but I kept it super simple.
Works well and if it ever fails I can still lock normally.