Tag
#parasitic drain
3 posts in Car Diagnostics blog about "parasitic drain" — OBD-II diagnostics, DTC codes, repair. ← All posts
-
Battery flat overnight: how to find a parasitic drain
The car stands a day or two and will not start. How a parasitic drain differs from a worn battery, what quiescent current is normal, and the order in which to hunt the culprit.
-
Aftermarket accessories: why the car started misbehaving after the dash cam went in
Dash cams, alarms, seat heaters, and audio are the most common cause of electrical faults that then get hunted for weeks inside factory systems. How they cause damage and how to avoid it.
-
Battery flat by morning: finding a parasitic drain, and why OBD is only half the answer
New battery, alternator charging, and the car still will not start in the morning. Something is refusing to sleep. How to narrow the search through diagnostics, and where the line is beyond which you need a multimeter.