Ok, there was a version of the running bumper lights mod on the resource a few years back, but after trying it out, I didn't like it. The reasons are as such:
The brightness was high, they did not look good at night. Simply too bright. The second reason being that it relied on the turn signal circuitry to flash the light in two different modes, with the lights already on, and with them off. Not reliable or easy to figure out the wiring.
That led me to design my setup, which nobody else has ever used or thought of, as far as I know. I quickly found though, that with the stock single bulb setup there, I could not easily eliminate those two problems.
My final method is much simpler and more reliable, as it does not change the turn signal relay circuit, and keeps the running light completely separate from that circuit. 8)
My first plan was to add a second bulb into the housing for a running light, maybe a 194. But then I thought about the dual-brightness of the brake lights, and decided to use a dual-filament bulb in the stock location. In this case, I decided on an amber 1157 bulb.
So here's how it's done:
1. Go to Autozone (or any FLAPS) and purchase a pair of universal 1157 sockets and a pair of bulbs.
2. Run only one wire per side. Splice one end into the front bulb of the corner light's positive wire, and the other end to the 'dim side' of the 1157 socket. Remember to solder all connections! (You'll need to experiment to see which side is bright and which is dim. You do that by putting a bulb in the socket and connecting the ground, then run that corner light wire and turn on the parking lights. Then touch the wire to either side of the socket and see which side is brighter.)
3. Cut the stock bumper light socket off and strip the wires. Solder the stock turn signal's 12v positive wire to the bright side of the 1157 socket. Solder the stock ground wire to the 1157 socket's ground.
4. Use silicone or some kind of sealant to hold the universal 1157 socket into the bumper light housing, as it will not 'quick-lock' like the stock bulb socket.
5. Test it out and make sure everything works like it's supposed to.