The way it would work is that if the parking lights are off and you hit the turn signals, both the side marker and the front turn signal would blink at the same time. When the parking lights are on or the headlights and youy click the turn signal, the front signal and side marker would alternate flash sequence. That is how you traditionally wire in side markers as turn signals/side markers.
Get access to the side marker light wires. You will see two wires attached to the lamp. Cut the ground wire about a couple of inches from the lamp. Give yourself some room. In order for this to work, you MUST CUT the wire. Splicing into it will not work.
Next move onto the front turn signal/parking lamp connector. You will see three wires going to the single lamp in the plug. One is ground, another is the turn signal, and the other wire is the parking lamp. Carefully cut about 1/2 inch of insulation from the turn signal wire. DO NOT cut the wire, just the insulation from it, so about 1/2 inch of bare wire shows.
This is the wire that you are going to attach to the ground wire of the side marker light that you cut earlier. Connect the two wires together with quality barrel connectors and tape them up with quality 3M electrical automotive tape or use heat shrink (best). If you wish you can solder them as well, but it is not necessary and would give you the best connection.
I know this sounds strange to some people connecting a ground wire to the hot wire of the turn signal, but it works

. The hot wire acts as a intermitent ground for the side marker and alternates in cycle.
Do the same for the other one...
The parking lights and side marker lights will work the same as normal. In the daytime, when you put the turn signal on, the side markers will blink with the turn signal. At night, when you have the parking lights on, and use your turn signal, the side marker lights will blink opposite of the turn signal. Meaning, when the front turn signal blinks on, the side maker will blink off, and visa versa.
This should work. I haven't done it on my car but this is the general way to wire them up and how I did in on my previous car. Works like a charm
