1964 Buick Riviera drained battery

1964 BUICK RIVIERA
23,000 MILES • V8 • FWD • AUTOMATIC
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TARAI
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rebuilt

I have already checked the alternator, all illuminators, radio, a/c, lighters. All those things are good. The battery drains completly every night after driving the car. I have also already had the battery tested and it is good. What should be the next thing to check?
Nov 17, 2008 at 8:51 PM
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MHPAUTOS
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Hi there,

Do a current draw test, place an Amp meter between Battery Positive (+) and the cable, check current draw with key off and doors closed, if current draw is above about .15Amps, start pulling fuses one at a time to isolate the faulty circuit, also disconnect the alt as you may have a faulty diode which will cause a drain back, start here.

Mark (mhpautos)
Nov 18, 2008 at 3:34 AM