I bought a 1980 Camaro a week ago, runs and drives real smooth only 74k miles on the drivetrain and body. The only issue with it is that 3 out of the 4 front lights don't come on, and the one that does will go out if I move the wiring harness around a bit, the previous owner also had a blue light added to the grill. Does anyone know what it could be? I'm not experienced with electrical work. Thanks

 

Sounds like you need to unplug and clean up connectors on the harness and check that all grounds are connected and not corroded.
Whatever that blue light is I pull it and any associated wiring that may have been spliced in.
Are you sure the bulbs are good?