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Mystery Battery Drain- Printed Circuit Board? 700 1991

posted by  targustargus on  Tue Jul 29 11:26 CST 2008
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last visit: Fri Aug 1 04:13 CST 2008
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I'm the owner of a 1991 740 Turbo sedan. I've gone through a couple of alternators and batteries in the past month or so trying to find out why a battery
only lasts 2 or 3 days before needing to be completely recharged. I've not done this work myself, but here's what the mechanics I've taken it to have said:
1) the alternator in it now has the proper amperage and is working properly 2) attempts to find a parasitic load on the electrical system have failed, including
looking at the aftermarket stereo as being a possibility. The mechanics I have working on it say they are 95% sure the issue lies with the printed circuit board, problem is, these particular circuit boards are on international back order right now. Any thoughts on this? And might I be able to find a printed circuit board somewhere else quicker? Thanks!






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