My ldv clicks when i try to start it. doesn't start

could be battery . It needs a huge amount of charge to turn over the starter motor. It may work the headlights but be unable to turn the starter motor.
Suggest get battery tested at a battery seller to see if battery is really ok .
The click is most likely the solenoid on the starter motor clicking on.
You might be able to get someone to run jumper leads
Note +ve to + ve and negative to negative !
from their car while the engine is running and their car is not moving !
Wait 10 minutes
Then try to crank over your car engine .

I jump started a 4wd vehicle a month ago from my car and it took about 10 minutes to get enough charge in it to crank over the engine !

Hi Andy, The links below are two short youtube videos that shows how to fix a car that doesn't start,
The 1st link is a car that won't crank over and the 2nd link is a car that cranks over but won't start...CHEERS..
https://www.youtube.com/watch?v=TSE0fOrujW0 Fixing Car That Does Nothing When You Turn The Key

Fixing Car That Cranks But Doesn Start Up
Also you can try these.......
Camshaft Position Sensor P0340 Testing and Replacement HD

Crankshaft Position Sensor car not starting coil spark

Possible internal starter problem. Try tapping on starter motor while key is held in crank position. If vehicle starts, suspect a starter motor problem and replacement will be required

We'd need to know more about how you have assessed these components, but something in that chain is still faulty. The symptoms you describe are classic, the sound of the starter solenoid pulling in, and arise almost always from

- a dying battery which cannot hold a full charge, but which can still pull in the starter solenoid, run the radio etc, but not crank the motor
- worn starter solenoid main contacts which cannot close the supply circuit from battery to starter motor
- a dead segment in the starter motor armature which is preventing it from rotating
- a bad ground, usually between motor body and chassis

You have mentioned all these things I know, but that click-click is a first step which still points the same way..

One way to narrow it is to try jump starting your motor from a known good battery or another car with running motor, taking precautions to avoid frying your electronics. If it starts, it is a bad battery you have. If it just clicks, then one of the other causes.

Check connection battery,could be starter.

A click every time you activate the starter motor generally tells us that the solenoid is working fine, but that the starter motor is faulty and requires repair/replacement.

To just double check:

Turn on the headlights when cranking.
If the lights dim significantly, then the battery doesn't have enough charge to power the starter, and the battery could require replacement.
If the lights don't dim by much, then the issue is most likely the starter motor.

Starter solenoid terminals maybe defective. Try replacing the solenoid.

loose or dirty battery connections ,starter solenoid faulty, low battery

sounds like a main fuse or a fusesable link

Possible causes are: 1. Loose or corroded battery cables. 2. Bad starter 3. Dead battery. Try tapping on the starter with a hammer while someone is holding the key in the start position. If it starts then replace the starter. Thanks