Toyota Repair: Light Failure Warning light, combination meter, metal brace

Question
My '96 Camry ZX 2.0 /right hand driving/ sedan has Light Failure Warning light problem.
When starting engine it does not the light the light failure warning   
ligth on combination meter. It seems ok. But when I   
push the break pedal it lights up until the engine stop. All of the stop and tail light bulbs ok.  
I never changed the bulbs. Is that problem of light failure sensor? Could you help me to find the location of Light failure sensor? Where is it on my car?  

Answer
There are a few possible causes for this, the wires in the harness on the left trunk hinge may have seperated inside the insulation, the wire harness has to be cut open to check for any broken wires, there may be a wrong bulb installed in one of the bulb sockets or the light failure relay may be the cause, it is located in the left side of the trunk and the carpeting has to be removed, the relay is located on a metal brace inside the trunk on the left side.