I have searched and searched and cannot find for 1989 online!! every other year I can of course! I wanted to trim back my factory harness to where all I have are brake lights, power windows and parking lights and headlights and was successful except somehow I killed my headlights.... I think it may possibly be I may need to wire my multifunction switch back up because the brights run thru it but not sure so if you have a wiring schematic please share, thanks