To fix the fog light, check the wiring loom by opening the trunk, lying down with you back on the trunk floor. Using a flashlight, inspect the wiring behind the left side rear hinge- it wears here and the wires can short and break. Some double-sided padding and PVC tape will be handy as the wires often wear through so you might have to splice them back together and re-insulate... if this is not it the next step is to remove the LKM (Light Control Module) from its home in the fuse box- open it up and check the PCB doesn't have the typical dry joints under the relays...Nick