I have a minor problem with my parking (marker) lights up front....all parking lights work fine but only with headlights on.
If I bump headlight switch into parking light mode, I have no power at feed (brown) wire.
Thinking it must be the headlight switch itself but they are such a pain in the a**, looking to see if I might be missing something before I replace the headlight switch.switch.
Thanks in advance!

 

Tell us what year and model car you dealing with. Guys with the electrical expertise will chime in.

 

Oh, sorry...1972 Cutlass S

 

Do the dash lamps work? If you look at the diagram the dash lamp fuse is powered by the taillight power. No power to the taillight, no dash lights.