Quick electronic question. radio (grounded)

[Blenjar]

If a radio is isn't well grounded, it will not function the right way? For instance it will freeze during music play or others.

For example:
Indash dvd crap is installed. when I break or go on bumps...the radio flickers.

- It is not the cablng
- It is not the indash dvd
- is it not hte CD skipping

-- Can it be the grounding (where it is screwed down) isn't that well grounded
If hte indash isn't well grounded. will it be wise to have a direct ground cable from the bttery (using the fog light entrance) to the radio? (using the harness that is)

Let me break it down even further.

I'll bring 1 cable from battery to the dash. That cable be connected to the bracket of the radio + the black ground cable of the harness.

**I'm assuming is it hte grounding, if not what can it be?
repunch: only happens on nasy holes or bumps and when I make a nasty brake.

any inputs will be well appreciate it. I'm stuck with a gay generic (never buy generic) $300 indash dvd. I don't regret spending it...well sort of but its okay. its my loss.

After spending that much on my HID projectors...300 is noffin :'(

-- Blen