First of all check your alternator to make sure it is actually working. A certain short in the voltage regulator (built into the alternator) might drain your battery when the car is off. Your erratic tachometer indicates that the voltage has dropped significantly when the engine was running and that indicates that the alternator was not charging the battery.
Have your alternator tested first. I bet this is your problem.
Let us know how it turns out.
Greetings from Poland!
Vin 6149 plus 2418, 3633, 5030, 16473, 17086
Google earth: 52°25'17.66"N, 21° 1'58.40"E
Monday, while driving around, my Tachometer started freaking out, wildly going from realistic, to 3000 to 2000, to redline, to realistic and so forth. The next day, the battery was stone dead. I removed the battery (less than a year old) and charged it overnight, reinstalled it last night and, this morning, it was dead again.
Has anyone seen this behavior in a major appliance ((Ghostbusters ref) DeLorean)? Can anyone please tell me where the short circuit might be? I really hope to fix this by Sunday since its registered for a Car Show.
Posted by: "Tom" <dmctom@xxxxxxxxx>
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