arsene2000

i'm just got a 2005 g55, and trying to troubleshoot some electrical issues.
1/ cars auto-lock after about 30sec, unless i open the driver door. It auto-locks even if i open the back door: is it normal ?
2/ the cargo lights do not light up when opening the back/cargo door. They do not light up when pushing the overhead switch, unless i switch the ignition ON. Normal ?

dryheat73

I'm not sure about your first question, my truck doesn't autolock at all. I would guess this is a setting that can be changed with Xentry software. I think the cargo lights sound normal. Do they turn on with the rear switch? The latch on the rear cargo door can rotate and turn on the cargo lights.

invictusmaneo

you can change your auto-lock settings in COMAND IIRC. Otherwise that sounds correct, I think the trigger to not do it is the driver door unless you have autolock turned off.

On your rear door, you may be having issues with your microswitch that is in the door latch. It is pretty common (mine is bad) and requires replacing the latch.

arsene2000

It is weird though: i would have assumed that if the microswitch was bad, i would have a door open warning when the back door is closed...
Do you have your cargo lights lighting up when you open the back door ?

invictusmaneo

I agree that ultimately that is what will happen (that is where mine is now).

But my first issues started with a few months of the light just not going out first. Then it progressed to the dash giving me the warning. I have just been too lazy to replace the latch/switch.

Not saying I understand what is causing it, other than through process of elimination that is where I am at haha

YCHU

Mine lights up when I open the back door

arsene2000

i guess i'll be looking at changing the microswitch

invictusmaneo

it's not a cheap part or super simple to replace, so you may want to troubleshoot first. Fuses, bulbs, check for signal going to the bulb socket, etc.

arsene2000

i don't know what to troubleshoot any more...
the doors locks from central locking, fuse are fine, no open back door warning when i drive. cargo lights light up when keys in ignition and i press the cargo lights switch.
The only things that don't work are : the cargo light does not light up when i open the back door, and the cars locks itself up after 30 seconds if i open the backdoor (it does not locks itself up if i open any other doors).

Poolshark314

Do you mean the doors lock 30 seconds after unlocking using the keyfob? If so, I believe this is a setting on your instrument cluster display. A lot of cars have this feature now. I don't recall the exact setting, but I can check mine when I get home if you haven't checked this already

arsene2000

Yes. The only options i found from on the instrument cluster display is "autolock", but it is only for the autolocking when driving. not for the autolocking after unlocking with the fob..

Poolshark314

It looks like it is standard behavior. This is from page 94 of a 2005 G55 manual. That line is only mentioned under the Global unlocking section though. Maybe if you holding the buttons to switch it over so only the driver's door unlocks then maybe it won't auto lock?

arsene2000

what is not "standard behaviour", is that is does lock after 40sec even if I open the tailgate...
which makes me think that the microswitch in the tailgate lock assembly is defective, even though i don't get a "back door open" warning on the instrument cluster...
and changing the backdoor lock assembly is %$@%$#%@.