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Hey guys. All the lights on my d90 flicker. All interior lighting and my headlights and taillights. Also my rpm gauge jumps up and down and doesn't read my actual rpm's. Anyone know what could be the cause of this?
 

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Diode ripple from a bad diode pack in your alternator. You probably need a new one, you can get it tested for free on the car at most auto parts stores.

Hey guys. All the lights on my d90 flicker. All interior lighting and my headlights and taillights. Also my rpm gauge jumps up and down and doesn't read my actual rpm's. Anyone know what could be the cause of this?
 

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My headlamps and interior lights started flickering. It's only very slight - not that severe, but it's a new symptom.

Here's a video showing how they look, probably easier to see the pulse-rate by the headlamps on the wall vs. the panel.

Is this the same symptom that the OP mentions where a "bad diode pack" is the possible cause?

https://www.youtube.com/watch?v=6M5QMvXqFwU
 
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