New user strange dash and blinker problem
 

Hey guys i just picked up a 2004 g35 coupe, its had some fairly odd wiring done in it that i need to resolve. It has aftermarket headlights(i think as they dony look like stock), and some aftermartket interior rice lights and guages tapped into it. It also has an aftermarket double din head unit and amp. When i signal left, everything is normal. But when i signal right, the dash and info above the clock dim everytime the signal light blinks, as does the headlights. Is something tapping too much power? Or is the aftermarket headlights the problem. Also signallimg right the brake lights blink aswell. Could this be a faulty groumd? thank you!!!!