AGT Xenon HID H4 issue...

[areithan1980]

I bought a new kit from a local speed store and they seem to work fine and i know i did all the wirings fine i got the low and high beam working and work s great except for when i turn it on usually on start up it will shake a lil (liquid like movement) or like a loose tunsten movement then it will stabilize after like 10 sec. But after like 40sec to a minunte one fo em will start moving again and its very random sometimes teh right side or left or both then it stabilizes again. I dont know whats wrong ballast or ground. If its a the ground can i hook my grounds directly to my negative battery?? im not sure if i can do this or not but maybe that will give me more or better ground. TY