I've had my HID's for about 1 month now (VVME 6000k) and every once in a while the headlights will flicker and all the cabin lights including the gauge cluster will go dim. The headlights however stay have the same brightness. A few moments later, the headlights will flicker again, and the lights will all go back to normal. This happens mainly when I'm doing city driving (turn signals, braking, shifting, accelerating, etc.) versus highway driving (just gas)

Is this a cheap relay/wiring harness issue?

Thanks