Major Key Off Loads Such As Air Suspension or Load Leveling

Vehicles equipped with these features will have temporary current drains that may last up to 70 minutes after ignition switch is turned OFF. These drains can range from 0.1 to 20 amps if the air suspension compressor is cycling. This action can often mask a concern and must be considered when evaluating test results. To test for this kind of drain proceed as follows:
1. Repeat the Drain Testing procedure. Drain Testing Procedures
2. Turn ignition switch to RUN for a moment and then OFF again.
3. Disconnect major key OFF load circuits.
4. Make sure interior lamp is off, if applicable.

The current reading (current drain) should be less than 0.05 amp. If it is higher, disconnect fuses and starter relay leads as in the previous test to locate the problem circuit.

If the drain is less than 0.05 amp, reconnect the major key-off load circuits, turn ignition switch to RUN and then OFF and wait 70 minutes to make sure they shut off properly. If current drain is still greater than 0.05 amp after 70 minutes, disconnect each of the components one at a time, until the cause of the current drain is located.