Main dipped headlights not working

No you are not getting voltage out of the headlight switch. You may not be getting voltage TO the switch. Go back to the earlier posts, and figure out the switch pattern. This is also in the wiring diagrams. Remember, there is TWO power sources to the switch.........tail fused power and headlight only power

On the older cars it is normal for the park lamps to go out when headlights are on. But the side marker lights should stay on

On the later cars Ma did a "trick." All Chrysler did in the later cars to keep the park lamps on with the headlights was to move the wire for the front park lamps over to the tail lamp terminal. Used the same headlight switch.