1980 BMW 518 flasher key

Electrical problem
1980 BMW 518 4 cyl Front Wheel Drive Manual

hi
how are you?
one problem occure for my car and it is flasher.
when I push flasher key on control consule
those yellow lights on righ of car flashing that is ok but two yellow light in left of car no flashing and always are on.
please send for me electrical circuit for bmw518.
thanks for you.
good bye.