So Im not super knowledgeable with LSPDFR and GTA Modding But Ive been using LSPDFR for a month or so now and been having a good time. but i got on today like normal and when i turned the police lights on no lights actually showed up. I havent messed with any of my files since the original time i got LSPDFR. 

 

Can Anyone give insight on what I need to do?

I occasionally had that problem and I read somewhere that just a restart of your computer should fix it.  I would restart the computer and then load the game and the lights worked again.  Hopefully that will work for you.