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HELP!!! I CAN'T OPEN MY CAR'S TRUNK W/ A DISCONNEC

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Old 03-15-2009, 02:13 PM
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Originally Posted by JAY'545' post='817288
He has the ground wire to the battery disconnected which means the car electronics are removed from ground. The jumper terminal connects to the battery high side. If you jump the car electronics ground is still disconnected.
agreed. i'm out of options at this point.

Originally Posted by EBMCS03' post='817374' date='Mar 15 2009, 11:39 AM
Ya thats what I thought too but I dont have one to try either... Maybe someone can try...

I cant imagine it being to difficult to get into the trunk w/out battery...
tried it hard as f**k and nothing!

anyone else?
Old 03-15-2009, 02:25 PM
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put the key in the trunk thing turn it then manually press the open button it wont open alone you have to push the trunk up kaboom success!
Old 03-15-2009, 02:25 PM
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unless you locked your trunk with your valet key then only your valet key could open your trunk
Old 03-15-2009, 02:37 PM
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Originally Posted by jcool10181' post='817547' date='Mar 15 2009, 06:13 PM
anyone else?
Take it to the dealer tomorrow.
Old 03-15-2009, 07:54 PM
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Originally Posted by jcool10181' post='817547' date='Mar 15 2009, 03:13 PM
anyone else?
I've been looking through the wiring diagram and I think you have two options.

One option is to apply power to the jump point under the hood and then issue the trunk unlock command on the k-can (body can-bus) to tell the trunk module to open.

The other option is to get under the passenger side of the car, locate connectors X13253 and X13252 and remove them from the Basic Body Module.
Apply power to pin 3 of X13253 (which should activate the trunk release motor)(It should be a black wire with a yellow stripe).

To get to the Basic Body Module you'll have to remove the panel in the foot well behind the glove box (as you look up from the floor). It looks like a royal PITA.
Old 03-15-2009, 08:45 PM
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Originally Posted by jcool10181' post='817547' date='Mar 15 2009, 06:13 PM
anyone else?

Something like this could work: http://www.batteryjunction.com/wagan-2045.html
Old 03-15-2009, 09:10 PM
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any luck?
Old 03-15-2009, 09:37 PM
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Originally Posted by ObD' post='817887' date='Mar 15 2009, 09:45 PM
Something like this could work: http://www.batteryjunction.com/wagan-2045.html
If the battery is disconnected you no amount of jumping or charging will work - the circuit is open. Taking out the back seat is about a ten minute job, easy to do.
Old 03-15-2009, 11:21 PM
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Originally Posted by Westcoast M5' post='817923' date='Mar 15 2009, 10:37 PM
If the battery is disconnected you no amount of jumping or charging will work - the circuit is open. Taking out the back seat is about a ten minute job, easy to do.
Humm... You've said this before but I think you are mistaken.

The 'jump start terminal', G6430, is tied directly to X13769 (positive terminal) on G1 (the battery). As long as X6402 is not disconnected (negative from the battery to the chassis), then applying power to G6430 will act just like a battery.

If X6404 was disconnected from G1, then there is NO open circuit and the 'jump start terminal' will work just fine...
Old 03-15-2009, 11:54 PM
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Originally Posted by or_550i' post='817987' date='Mar 16 2009, 12:21 AM
Humm... You've said this before but I think you are mistaken.

The 'jump start terminal', G6430, is tied directly to X13769 (positive terminal) on G1 (the battery). As long as X6402 is not disconnected (negative from the battery to the chassis), then applying power to G6430 will act just like a battery.

If X6404 was disconnected from G1, then there is NO open circuit and the 'jump start terminal' will work just fine...
Only said it once, but......

You may be right, I'm not an electrical engineer but still recommend he just pull the back seat - simple job and he'll be up an running in no time.


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