Um... if you are refering to the high beams and low beams, hold Square (PS3), X (360)
He mean "Signal" lights. Turn signals. Make sure you spell things right, original poster, it will save you trouble later! Anyway, you can' use turning signals in GTA IV. You can get some good mods for it, but they are ONLY ON PC.
188.8.131.52 15:59, March 15, 2012 (UTC)