1973 tail lights function

[shovelhead]

Just need to know function of my inner tail lights on my challenger,the outers are tail lights,brake lights and flasher/indicators.Should the inner lamps illuminate as a tail light or are they only for reverse lights?I thought they light up too but maybe not?Please advise

 

[Challenger RTA]

Both functions. 1157 bulb. Reverse is easy figure out.

 

[Vaanth]

Just need to know function of my inner tail lights on my challenger,the outers are tail lights,brake lights and flasher/indicators.Should the inner lamps illuminate as a tail light or are they only for reverse lights?I thought they light up too but maybe not?Please advise

The outer position lights and entire red lenses are stop/tail/turn lights, plus hazard lights, and fully illuminated by the lamps.

The inner position lights and white/red lenses are the reverse lights only and the translucent white lens is illuminated by the lamps, although there is some glow behind the red in revese. The outer red part of the lense does not light up with the outer tail light but is backed by a reflector that is actually part of the white lens:

 

[shovelhead]

Thats a really great description,exactly what i needed to know,many thanks for both replies