All Warning Lights come on when revving over 4000RPM and they turn off when it goes under 4000RPM, i was wondering if anyone knows waht can cause this, i have considered the Alternator possibly, due to it now charges at 12 or a little below and last week it was in the high 13's sometimes over 14 slighty, The car is an S5 GTUs,

 

If it's not a loose belt slipping then it could be the alternator is going out. As in worn out carbon brushes inside the alternator.

Also make sure the small two wire plug on the alternator is on good and the contacts inside the plug are not *pushed back* making intermittent contact with the contacts inside the alternators jack.

 

yeah i belts actually new i changed it about 10 days ago along with the a/p and wp and ac belts also, i was also figuring it was the alternator as well

 

If the alt is failing, get a reman alt from Mazda. Any place else will just give you headaches. Took me 4 tries before I finally got a decent one...