Battery Drains That Shut Off When Battery Cable Is Disconnected Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Perform battery drain test. See BATTERY DRAIN TEST . Ensure all doors are closed and accessories are off. Without starting engine, turn ignition switch to RUN position for a moment, and then turn ignition switch to LOCK position. Wait a few minutes for illuminated entry lamps to turn off (if equipped).
- Connect ammeter between positive battery cable and positive battery post. Disconnect positive battery cable from positive 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.