How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask PorscheDoc Your Own Question
PorscheDoc, Independent Porsche shop owner
Category: Porsche
Satisfied Customers: 6457
Experience:  20 years of experience working with Porsche. Independent European shop owner and technician.
Type Your Porsche Question Here...
PorscheDoc is online now
A new question is answered every 9 seconds

2007 Carrera: My battery went completely dead...brand new..hood and I

This answer was rated:

I own a 2007 Carrera 4S and have not turned on the car in a month. My battery went completely dead. I use a brand new donor battery as per manual recommendation and follow every step to open up the hood and I still can't open the lid to replace the battery. What else can I do in order to replace the battery. Do I need to use an electric battery booster? Please help!

Can you tell me the exact steps you used to supply power to the fuse panel?
Customer: replied 6 years ago.
I used a brand new donor battery with booster cables. I place positive from battery to positive at the fuse box then negative from battery to door chasis and still can not pop the lid
Unfortunately, that is the only way I have been able to supply power to the boot release. Other than making absolutely sure the clamps are secure onto both items, and possibly trying another ground point, I have no other suggestions.
Customer: replied 6 years ago.
Do you think that the boot release is actually frozen in place and that is why it not releasing it?
I really doubt that, at least from my experience. Still, let me get on a technician's group I belong to online, and see if I can find if other guys have run into this.
Customer: replied 6 years ago.
With the donor battery attached as per owners manual, I press the botton on my key and it actually makes a sound as if it want to open but no release.
That definitely changes things quite a bit on my end. This car is going to have to go to a good independent Porsche shop or dealer so that they can attempt to get in using other methods that are all but impossible for me to relate. So with that, I really have no answer for you. If you'd like to keep your deposit in the Justanswer site for a future question, that is welcomed, or if you desire a refund, I can alert the moderator here.
Customer: replied 6 years ago.
I finally manage to replace the battery, however, as soon as turned on the ignition a warning came on saying PSM Failure. What does this mean? Did I do something wrong while replacing the battery?
Have you driven the car yet?
Customer: replied 6 years ago.
No not yet. Should I drive the car to see if goes away? I noticed that during the replacement of the battery, I connected the negative terminal first instead of the positive. Would that make a difference?
No, you sequence is not overly important. The PSM system will go through a selt-test within the first few hundred yards of driving. The light should go out pretty quickly, even before you leave your driveway.
PorscheDoc and other Porsche Specialists are ready to help you

Related Porsche Questions