While off, the lights are lit by the sun

Hello everyone ...
I have a festive Ford year 94 and I have always had the problem that the crossing lights, stops and those of the board light alone when my car has a long time wearing.
This happens while the vehicle is off, causing the battery to be downloaded. And when lighting the lights, there is no way to turn them off until the car is cooled.

If there is someone who has a possible cause or solution please help me.
Thank you

It is extremely strange your fault, I do not see that it can be operated by heat and light your lights, the only thing that could suggest is that when the fault is presented, you disconnect the battery and pay attention to the sounds since it is probably a re-lay that causes said failure to listen to a click when connecting and disconnecting the battery although I understand that some cars have a photosensitive cell that allows lights to be automatically light Your case.

Good

, what comes to mind is that the heat dilates or the switch of the lights or other component and makes contact, and when it cools it disconnects. Or inside the board some contact dilates and the same happens.

Check it and already accounts