Best Replacement Turn Signal Swich

While looking to see if I need an 8 or 11 wire switch, I moved the wiring harnesses around and got the blinkers to work. I actually think it is behind the dash where the problem lies.
I have the 8 wire switch. The 11 wire is for "cornering lights"...what are they?
I have working side marker lights which are a separate circuit. Are they fender mounted turn signals? Car is a 74 Duster BTW.
Thanks