[Q] deleted wpa_supplicant.conf topic

Hi everyone, I need a help. So I have problem with the WiFi ( it's light green ) , so I rooted my phone got Solid Explorer , and I have read in another forum that it will help if you rename or delete that file : "wpa_supplicant.conf" from the path /data/misc/wifi or /system/etc/wifi. I tried to rename them both in both directories , didn't work, so I decided to delete them both as well. It's supposed to create a new ones when you turn the wifi on but that never happend for me. So now I don't have any of those files, and even worse my WiFi button doesn't even turn any green , just stays grey. Can I restore them somehow? Or what should I do now? I'm getting lost.. Thank you!
P.S. I'm with 5.0.1. Lollipop all stock firmwares and everything, Galaxy S4 GT-I9500