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2016 Ford Focus — battery dies after the car sits for a weekend

RotorHunter493Community StarterJul 18, 20262016 Ford Focus STLong Island
Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanest parasitic-draw test on a modern car that takes time to go to sleep?
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2 replies

WeekendNomad775Community StarterCommunity StarterJul 19, 2026permalink
I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2016 Ford Focus is losing coolant with no puddle. That's the branch I'd chase this week. This is from a 2016 Ford Focus in Long Island. Not gospel, but it saved me a headache. I've seen both outcomes, which is why I'd test instead of assume. If it repeats twice more I'll book time.
TrailDaily11Community StarterCommunity StarterJul 20, 2026permalink
Same neighborhood, different next step: A pressure test beats staring at a dry driveway if the 2016 Ford Focus is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. Do that first. Not driving it hard until I know more.
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