Headlights pulsing sounds like a voltage regulation issue OR a charging issue. When I had headlight pulsing on one of my cars, they replaced the alternator. No joy. They thought the new alternator was bad so they replaced it at no charge. Still no joy. They finally determined that the car's Electronic Control Module was what was actually controlling voltage and it was defective. Changed the ECM and the car is good to go. On your Newell, there is no ECM. Voltage is controlled through a voltage regulator. Either the voltage regulator is bad or the alternator is breaking down on you.
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