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99 Eldorado electrical problem

04-05-2009, 07:55 PM
Whenever I accelerate or rev the engine the headlights and dash lights start to flicker really bad. I watch the voltage and it fluctiates from 12 to 13.7. And it feels like its effecting performance too. Is this an alternator problem?

04-05-2009, 08:06 PM
Sounds like it-- have it checked- Alternators should run at 13.5- 14.5volts..depending on load etc..

04-07-2009, 01:45 PM
You might want to check the belt tensioner and the serpentine belt itself. It could be insufficient tension on the belt because of a defective tensioner or a badly glazed belt.

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