Wiring harness differences
 

Any differences throughout the years besides the turn signal plugs?:lame::google::rtfm::search::asshat::bananad ance:

You could try looking at the schematic in the workshop manual... It gives you a clue or two...

Or one of the three-four threads in here named "differences between years" and similar where the differences are listed... Between them you have a pretty complete list...