Tach needle spazzing out??

This has been happening for months now, but when i turn my signal lights on or hazard lights on, my tach starts spazzing out. It jumps all over the place. Sometimes lights on my guages will turn on too. Any suggestions? lol

myne did that too it would freak out then just go down to 0 even though it was still running...but all it was was my alternator going an di had to replace it...but maybe its just you are using too much electornics and using up too much power or maybe your alternaotr is going too...

hmm...time for new alternator then lol

take a straight metal pole, hold one end lightly against your alternator, the other one to your ear, if you can hear a griding metal noise or anything irregular then you know whats wrong.
oh, your car has to be on by the way.

haha thats the same thing that happened to me it still happens and i dont knwo what the deal is i checked my alternator and it was like 14 plus at the battery