Does anyone know if the wiring diagrams are available for the 86 lesabre?
I have the Chiltons #28200 86-99 repair manual - not good enough!

I am trying to trouble shoot problems from under the dash.

Go to a library and check them out there. Look for books on wiring diagrams only. Specifically, what problems are you working on. Someone here may have come across it and give you an idea.
Good Luck.