2007 Land Rover Supercharged fog lights wont come on

Do this logicaly firstly check the bulbs which you have done,now work down from the switch itself make sure you have power to the switch by checking with your multimeter and the ignition turned on ,now if you have power to the switch then check for power from the switch feeding into the loom wire ,now if still no lights and you are pretty sure you have power then check for power at the lights from here you work out what could be the problem ,which will be one of two things if no power to the lights then the fault could be a a problem with a multiplug corroded inside where the terminals are . Do this logicaly firstly check the bulbs which you have done,now work down from the switch itself make sure you have power to the switch by checking with your multimeter and the ignition turned on ,now if you have power to the switch then check for power from the switch feeding into the loom wire ,now if still no lights and you are pretty sure you have power then check for power at the lights from here you work out what could be the problem ,which will be one of two things if no power to the lights then the fault could be a a problem with a multiplug corroded inside where the terminals are .

Now if you have power to the lights but they dont light then its a earth fault and fitting a secondary earth will cure the problem .Now what i do when i get to determine that the switch has power but its not reaching the lights then i will get a length of wire and attach it to the positive side of the battery and then apply it to the light any one and see if it lights up if it does then i check the wires backwards for damage or a corroded multiplug ,i will also flash it to check the earth on the light in case their is more than one problem and to satisfy myself that the earth connection is ok . Now if you have power to the lights but they dont light then its a earth fault and fitting a secondary earth will cure the problem .Now what i do when i get to determine that the switch has power but its not reaching the lights then i will get a length of wire and attach it to the positive side of the battery and then apply it to the light any one and see if it lights up if it does then i check the wires backwards for damage or a corroded multiplug ,i will also flash it to check the earth on the light in case their is more than one problem and to satisfy myself that the earth connection is ok .