Left blinker stopped working , help.

You have to believe these are separate issues until you discover they are related in some way. Factory wiring diagrams can only help.
I really can't lay out a diagnosis procedure. I would start with a basic 12 volt test lamp at the yellow wire to starter relay. If I continue on to discover melted wires and crossed circuits at bulkhead connector, under the dash, back of inst' panel, wherever... I had to start somewhere. Good hunting