with a dual 12 v bayyery system why do the batteries drain?

Asked by Feb 21, 2017 at 03:18 PM about the 1990 Ford E-350 STD Club Wagon Passenger Van Extended

Question type: Maintenance & Repair

the lock cylinder is in the lock position and nothing is on within the instrument
panel. the only way I can keep the batteries charged is to disconnect the
negative cables until I'm ready to start it. Then it is fine

4 Answers


There is a short somewhere going to need to track it down, May need to use a short finder, they sell them at Amazon and other at some locations. I will upload a photo but it may get deleted by the site since it is not my photo.


There must be a parasitic draw. Check this out on how to check for that.... https://youtu.be/QRso1A0VScw



thank U very much, I'll check this out

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