[deandarien]

So Iinstalled a new head light switch and wire harness on my 66 gt coupe. The parking lights work w/ the switch in the park light position but turn off when the head lights go on...... Is this normal ???

[6T6Coupe]

That's normal - they was built that way. Headlights only when the knob is all the way out. So im guessin its the same for a GT.

[Smitten]

I did the mod that allows the parking lights to stay on with the headlights. Simple mod.

[Ivy66GT]

They never were on at the same time until some bureaucrat around 1980(?) decided to make it mandatory as a safety feature. That way, if a headlight burns out there will still be a visible side marker light (also not a parking function) to see so that your car is not mistaken for a oncoming motorcycle.

[6T6Coupe]

I think its kinda cool that they are the way they are...stand out from the crowd. I had a '54 Chevy Panel truck (i know you all know by now) but it was made with only 1 rear brake light. It was mounted on the rear left door. (knee level or little higher) It also had 2 parking lights mounted up at chest level (so total 3 parking lights in rear but only the lower one used as a brake light Used to get pulled over in high school because of it.

[deandarien]

Thanks everyone for your response . Now all I need to figure out is why the rear brake lights go on with the headlights and both tail lights flash with the turn signal ???

[Cobra6]

This is what we call a WAD

Works As Designed