ELECTRIC DIAGRAM OF THE MARCH BACK

I want to correct a current failure of the back because it does not pass current to the pilot, the intermeitent lights if it has the current is only the back light.
The fuse box is not.
I want an electrical system diagram by UNSEAT PANDA WHITE 92

You have to check the back switch in the gearbox, which is sure to be broken.

Ola thanks for the interest an question tell me to do it so as not to fool like it.
above or below what exact part or inside the body
thanks to the late friend

Hi Jose, many years ago I don't play one of those, but this is like riding a bicycle.
In the gearbox, in the front there is a monocontact (switch back) that arrives 2 cables. You disconnect it and with the contact put together the 2 cables (those of the switch no, those of the installation), you have to reach voltage to the rear pilots, if so it changes the switch and voila (typical fault)