Greetings, Last night, my headlights began pulsing: dim-bight-dim-bright. Then some instrument lights (ABS, skid warning light, red BRAKE light) began a slow on-off. I turned off all accessories (heated seats, heater, fan), no change. Engine RPM did not seem to pulse. Returned home after 4 miles at 40mph. All lighting continued to pulse while idling in driveway. I am thinking a failed alternator? New battery last winter. I might do a load test on the battery before AAA arrives to transport it to a dealer nearby. Has anyone had a similar experience? If so, what was the outcome? Thank you in advance. UPDATE: Battery @ 12.53 w/ engine off. With engine running the battery voltage varies wildly between 13 & 17volts. There is a low-pitched pulsing sound when engine is running.