Passenger fan works when stepping on accelerator

It is a Citroen Evasion 2.0 HDI

The problem is that when the car accelerator is floor, the interior fan of the cabin works. But when brake, or reduce the speed, the fan goes out as if it runs out of current and the battery indicator turns on. If I accelerate again. If I release the pedal, go out.

If I turn on the air conditioning button, it is worse, it goes out sooner, as if you throw more current.

Battery seems fine. The windows, lighting, work normal.

Thank you.

Hi Jossan509, this joke that is doing the fan engine may be that it has a broom grabbed in the collector and ... when you accelerate the axis of this and makes contact and goes ... when you stop it again moves towards the other meaning and no longer touches contact I get well; or turn more slowly ... disassemble the electrical engine of the fan and look at the brushes and then try it ... you will tell me ... you will tell me ... Greetings!!

Another thing that happened to me to comment, that you try if when you turn on lights, the intensity of the light of these also oscillates when you accelerate or decelerates, I say this because the problem is like of the alternator that has spent the regulator's brushes and not load the battery well, so also that oscillation of intensity is the same as in the fan and there the problem, therefore to review the brooms of the regulator of the alternator of the alternator.