Humour me here

[Matt]

Me and a mate were talking about American style marker lights. I said it would be possible to do by wiring in the side lights too the indicators. 
Am I right? 
But then the issue to overcome would be indicating... would it blow the unit if you indicted? Would it work?

I'm curious to find out if I'm right and guess you guys would know more than me. Mate says it won't work, you'd have. To put some sort of switch inline so you could turn them off to use indicators