Thread: Security and Anti-theft Relay/Module Questions
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Old May 2, 2013 | 11:09 PM
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zalsaigh's Avatar
zalsaigh
Joined: Aug 2009
Posts: 39
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From: Grand Island, NY
Default Re: Security and Antitheft Relay/Module Questions
Originally Posted by alaxfire
I know that F9 also feeds the BCM ( Body Control Module ) which is why the remote locking won't work. I 'think' it supplies the voltage for the CAN bus communication to the LCM in the trunk. You could look it up in the schematics and cut the wire at the BCM for this and see if that is where the drain is.
( I assume you have removed the bulbs from the interior and cargo lights to determined that they are not the culprit )

If you determine the BCM is drawing the current, then you are on your own from there, as far as I know, no one has internal schematics of the BCM, ECM, or RCM.

I would think a healthy battery would scoff at a measly 40 ma drain anyway.

Thank you Dave for the valuable information. When I checked the pump,the housing in the trunk was dry; there is no sign of water. I measured the drain continuously during the day and night with doors locked and unlocked. This went on for several days, the drain was pretty consistent. When I drive, doors lock without F9 on, when I stop and open the door, the unlocking works normally, that is because of the availability of vacuum. It is a good idea to unplug the pump and see. I shall be reporting my findings when I get to the pump again.
 
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