I was wondering how to go about connecting the side marker lights for the turn signals

I was thinking just cutting both the tail light wires and side markers for the back, the connect the side markers to the tail lights

I was also thinking of a way to get them to alternate, so they would not go on at the same time (tail light goes on, side marker off, then tail light off, side marker on, etc)

Ive seen the latter on several cars

I guess i already know this would work, so my real questions are how to connect the wires properly, how to get to them and how to set up the relay or whatever

 

You could Search the "How To" section. Been done and documented in there I believe.

 

The front markers - yes, rear markers - no.

It has - I had a boo-boo about two years ago and while it was in the body shop I asked them to do it and they did - free.

 

Why not the rear markers?

Drill hole, grommets, insert rear side markers into cabin to tail light wires, bridge them..

 

Check your state's vehicle code hhrumadbruh, in most states the rear side markers are not allowed to flash, you might find yourself undoing things after getting a "Fix It" ticket.

 

hmm

I see LOTS of cars with side markers flashing

mostly BMW's