Electronic Drains Which Shut Off When Battery Cable Is Disconnected Test
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- Perform battery drain test. See BATTERY DRAIN TEST . Ensure all doors are closed and accessories are off. Without starting engine, turn ignition switch on for a moment, and then turn ignition off. Wait a few minutes for illuminated entry lamps to turn off (if equipped).
- Connect ammeter between negative battery cable and negative battery post. Disconnect negative battery cable from negative battery post, without breaking the ammeter connection to prevent modules from resetting. Read amperage draw.
- Amperage draw should be less than 50 milliamps. If current draw exceeds 50 milliamps, remove fuses from battery/central junction box one at a time to locate problem circuit. Repair appropriate circuits as necessary. See POWER DISTRIBUTION in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.