Electrical Headlight switch not working properly

better off buying one from a local parts store for the lifetime warranty and replacing the pig tail since they are known to over heat and fail from the Fog lights with the factory wiring over heating them, not uncommon for the wires to be lose in the connector. Most parts store switches are either standard or wve reboxed as duralast or carquest...

Turn signals and parking light issues can be from the connector, I allways replace those on GT's and rewire the fogs threw a relay so it doesnt draw as much amps off the switch . another area to look is the multifunction switch on the column , check the wires on those pigtails for being loose or signs of melting, inspect those and pull the column cover off same for the dimmer switch as that's tied to the cluster lights and they get pretty worn from age where the slider contacts and spring needs a good cleaning. The way they wired the cluster and switches in these cars kind of sucked, best to remove the whole cluster and replace bulbs & inspect all the wiring pigtails at the same time too.