'02 Jeep GC

'02 Jeep GC - I was in an accident about 2 weeks ago. I was hit on the drivers side fender. Yesterday evening my left headlight went dim. The high beam still works but the low beam is very dim. While my headlights are on my left signal light flashes quickly but is normal while the headlights are off. I have replaced all the bulbs on the left side but no change. The right side still works as normal. Any suggestions?