When I've started my car this morning I notice that my handbrake and battery light stay on even if the handbrake was not engaged. I've tried to restart the car and the light goes off but after a couple of mile it lights again. At idle everything is normal but as soon as i give some gas those two lights appears and sometimes it's flashing. Anybody have an idea of what's the problem cause i didn't do nothing to the car since the install of my downpipe/intake/pulley/piggyback last month ? Oh and the ABS light goes on sometimes but ABS system still active

 

Brake and battery lights at the same time are the almost universal warning light for a failed (or failing) alternator. Make sure your ALT fuse isn't blown, and have the alternator tested.

 

Thanks Myszkewicz! I will check my alternator fuse and its charge with my voltmeter.

 

Alternator.

 

+1 on that alternator...