Dash rattle driving me crazy!!!

[1COOLH3]

I'm not usually one to bitch and complain about little things like rattles but I have one in my dash thats almost enough to make me drive into a tree.

It's a quick tap tap tap (like morse code)in the upper right side. I thought it sounded like a wiring harness in the A-pillar so I took the trim off and isulated the wires- noise is still there. Next I dropped the glove box door and either insulated or tie-strapped any loose wiring I could reach in the dash- noise is still there.

The strange is thing is it doesn't do it all the time - it has to be cold (under 60 degrees) and usually I have to hit a big bump first to make it start. Once it starts it doesnt stop- like it has to get knocked loose first.

I took it to my dealer but if course it wouldn't do it for them.

Anybody else have a similar condition?