Hi - well I recently purchased a 2008 CX- 9 knowing it had a battery drain issue - and I’ve isolated it to the “overhead light circuit and to the BMC connector 5.
Data I have:
1. As purchased, with key out and doors shut and no visible lights on - current draw is 0.4A after closing doors and then drops to 0.2A in about 1 minute and remains there constant. So 0.2A is really the continuous drain.
2. If I pull fuse #16 in the engine fuse box (overhead lights per the manual) the current drops to 0.00A (near zero)
3. Unplugging the hands free telephone module drops the current from 0.2 to 110 mA. So that device is drawing about 90 mA by itself.
4. Unplugging connector 5 on the BCM dropped the current draw from 110mA to about 20 mA
5. Tracing pins on connector 5: Pin 5J pulls 70 mA and pin 5N pulls 25 or so mA.
Does anyone know what actually to check or replace for the pin 5J “backup light signal” it seams related to a backup camera?
And any thoughts about the 5N door lock?
thx for any insight!
Oldschool1