1.Where do I get my 12 V Source from ? Off any constant? Does it need to come from the fuse box ( like in some modern cars they have a fuse in the fuse box labelled central locking)
This is always a 12v (+) battery constant on a wire large enough to handle the draw of the alarm system or direct to battery preferred for alarms.
2. In the diagram it says at the top centre *manual* I don't understand where this needs to be wired.
If you want to operate the central locking with a manual switch from inside the vehicle, location of your choice. Wired as in the diagram using the switch type listed.
3. In the diagram the brown wire says flashlight Where is this to be connected ?
Blinkers(turn signals) wired to each side left and right after switch. Both brown wires are Positive then fuse symbol then light bulb (Indicating light) symbol and ground symbol. basicaly showing the circuits for each light side.
4. The vehicle has a factory immobilizer, should I leave this in and not bother connecting the immobilizer bit in The diagram.
Unless this unit has a anti-car jacking (theft) that would shut down the engine after a timed duration when activated. Some Chinese units call this Anit-Robbery and have a 18 seconds timed delay to ignition shutdown. If you want this feature then you would need to cut the ignition wire and hook in the provided relay.
5. Why have they provided me with a relay where does this go ?
Applies to 4 above.
6. Some of these wires I don't think are going to reach should I just extend Them?
Once you have determined a location for the unit that the majority of the wires will reach. Then extend the ones that don't trying to match colors if you can.
7. Out of the brain unit the black wire which goes to 12 V source there is two blacks
Slightly confusing one goes to some picture that looks like a torch The other is ground The last one is 12 V battery Not sure how this works
This is new to me but would think that they are choices for the ground connection. As the first is the horn symbol the second is chassis ground and third is battery.
8. I don't understand any of the ignition Part. But would i need this ?
First part White alarm wire is required! The second for the segmented box (is a symbol of a relay short segmented ignition wire for where to cut, and right symbol is the coil) is a optional connection for the Engine cut-off. To cut the ignition 12v (ON) wire coming from the key if you use the the cut-off relay you would need to attach the White wire from the alarm to the key side of the cut ignition wire at the relay. Alarm yellow wire is ground for coil side of relay pin 85, pins 86 and 87a are both connected to key side of vehicle ignition wire with the White wire above, and vehicle side of cut ignition wire is connected to pin 30.
9. why would I need to connect it to the foot-brake do I need this again ?
With out reading the install guide it will probably be needed to enter programming mode as some of the Chinese unit use this for that purpose. Units that have Remote start will also use this to shutdown the Remote start as well.