Battery dies, but only when doors left open for 10 min.

[airline tech]

To possibly pinpoint down if (1) door is causing the issue - on a normal day vs non normal- are you opening and closing any door that could possibly be generating the issue that is not opened on a regular daily basis?

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[Ursulet3#]

I think it has to do with the rear doors now that I think of it. I wonder what the connection would be?

 

[airline tech]

I think I would:
1. Load Test the battery - Autozone Etc, just to rule it out
2. Scan for codes - mainly the BCM
3. With Meter on the battery - open 1 door at a time and note any fast discharge of battery voltage
then close the door and wait for dome light timeout, check and ensure voltage now holds steady then repeat same for all doors.

If the battery LOAD TEST is good, then there is a heavy amperage drain somewhere, and it can possibly be from a door ajar circuit - shorting out.
If this is the case - it should have a code generated, this will not trigger any MIL lights on the IPC

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