yeah i was wondering if anyone had this problem. I installed S5 tail lights in my S4 FC and when my lights are on only one of the two round bulbs are on on each side but when i press the brakes both are on and a light comes on in my dash. I was wondering if anyone knows why only one bulb is on when the lights are on. Thanks

 

maybe the bulbs are burnt out... swap them and see if the other one lights up

 

it wasnt the bulbs. i checked it out right now and notice the lights had 6 male connectors and my cars plug only had 5 females. so i just split the wire that puts the tail lights on when the lights on and put another female connector ande now they work like they are supposed to. Thanks for the help though