1 - Set your DMM to the 10 amp DC range and plug the red lead into the "10 AMP" socket on the meter.
2 - Disconnect the grounded (negative) battery cable from the battery post.
3 - With everything turned off (ign, lights, etc) stick the positive (red) DMM probe on the ground cable clamp and negative (black) probe on the battery neg post. The meter will read the standby the draw. (If it reads 0.00, switch to a lower current range (eg 300 ma) and reposition the red jack on the DMM if required and repeat the test).
IMPORTANT! Don't turn on any electrical load while doing this test!!
If the meter shows more than 20 ma or so of drain, remove fuses one at a time until the offending circuit is located.
If the drain persists after all the fuses have been checked, drain is likely a faulty alternator. Verify by removing the output (heavy wire) and control (plug) wiring from the alternator. If the drain disappears the alternator needs attention.
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