1973 Plymouth Duster

Electrical problem
1973 Plymouth Duster 6 cyl Two Wheel Drive Manual 18 miles

ok well ive got lighting problems. My brake lights and turn signals work, but my tail lights dont. I know that those are on the same circuit. I believe that the problem is in the head light switch because of the dome light. When I turn the switch to turn on the dome light it doesnt come on but it does come on when I open the doors. I just wanted a professional opinion before I started replaceing anything.
on a different circuit I also have no reverse lights or side marker lights. On this I have no idea please help
November 26, 2009.

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