Battery dead, cannot open the trunk

[Mig]

When my battery died, I put power from another vehicle to the cigarette lighter. You can get enough power through the cigarette lighter to deactivate the hood locking mechanism.

I used the cords that came with my trickle charger to get power to the cigarette lighter. My trickle charger came with three cords: cigarette lighter, alligator clips, and ring terminals.

I simply connected the alligator clip harmess to the cigarette lighter harmess enabling me to connct regular jumper cables.

NOTE: the polarity will be reversed so make sure to connect your battery correctly.

It may sound crazy, but you can hook up jumper cables to a cigarette lighter and not damage your car.

I now carry this little harnes with me at all times. Just in case...

[mikefocke]

Cig lighter is not for starting the car, just for powering the lock.

[Gilles]

Originally Posted by mikefocke

Cig lighter is not for starting the car, just for powering the lock.

This worked for me as well a couple of times on my '07 987 CS and also on a friends '07 911

I used 12V light that was already dead, cut the light portion off and applied 12V from an extra battery and managed to open the front trunk, since I was never able to find the emergency cable