Im converting my 87 GT to all LED lights. Everything was going fine till I put in the last 4 lights, the rear turn signals. Now the signals wont blink, even the four way flasher doesnt work. But when I put a standard 1156 in one socket that side started blinking. (Yes I already have an LED compatible blinker from blacktopupgrades.com) Do I need some form of resistor at the rear signals? Or is it something else?
'87 GT Fastback
'85 SE Notchback