I have a 1999 f 250 I installed 3157 led bulbs in my rear taillights I got the common hyperblink and I put a resistor like your suppose to and my blinker works fine now but my taillights won't come on... Any answers to help me fix the problem. Thanks

 

Connected in series or parallel?

 

Did you check to see if the taillight function worked while you had the hyper-blink problem?