Here's the simple diagram...
Because of the way the circuit is configured you already know a couple of things. The switch is good (working) - because it's turning on the left side. And, as it should turn on the right side thru the same wire, the problem is somewhere from the R/B input to the fuse box on out.
Some thing's been missed, if you actually did have continuity from any of the right side lights(+) to the switch, they would turn on.
To simplify, I would suggest concentrating on just the right side front marker - solve it, you solve the others. Be methodical.
By now you've probably:
a.) already identified which 5 amp fuse is for the right side - simply unplugging each fuse in turn to see what else goes out.
b.) checked that fuse - by putting it into the left position and they still work.
Next, with the switch off and your 'known good' fuse in place, check for continuity at the input R/B and right side output R/G wires just outside of the fusebox to see if the boxes connectors (fuse and wiring) are good.
If that checks out, dismantle the front side marker light, remove the bulb (it's good right?) and check the sockets ground to chassis for continuity. Also check sockets positive to chassis for continuity(short) just to be sure it's not. Then, run a long jumper wire from the right side fuse output - out the door and across the hood - and connect it to the front side marker lights positive at the lights connector (unplugged from it's normal positive wire). When switched on it should work, if it does - you've got an open in the harness somewhere.
I'd be interested to know the results. And please, something a little more informative than "no dice".