Alternator questions

[argenis69 10+ year member]

I have a question about my car or alternator. 2002 Nissan Maxima, I have a permanent volt meter inside my car monitoring my electric status due to my audio install, I've noticed that when I'm on the highway at high speed or when at high idle, normally above 2,000 rpm, the voltage drops, below 12.6v and the battery and brake lights start to blink on and off on the dashboard, even with my radio and complete system off. What is happening?

Thanks.*

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[argenis69 10+ year member]

Bump

 

[mlstrass 5,000+ posts]

belt slip possibly or alt is going bad...