Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Testing a Cayenne spare battery

silverspeedy
 Share

Recommended Posts

silverspeedy Member

silverspeedy

Posted
Posted

Does anyone know if there is a way to test the function of the spare battery in the trunk? I now have two new batteries, however I could not start off the spare battery before I replaced the main battery under the driver's seat as well. I'm suspecting the spare battery is not operational and I'd like to find out before I need it someday and it does me no good.Thanks!

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

Same as any other battery - remove it from the car and load test it (most auto parts stores can do this).

Also check the specific gravity of each cell.

wvicary Member

wvicary

Posted
Posted

The rear battery is not a "spare" battery, it is the battery used to crank the engine. Even if it is new you should have it tested as Loren suggested and also test it's charging voltage when the engine is running.

  • 11 months later...
  • 2 weeks later...
CdnRD Member

CdnRD

Posted
Posted

Would a worn second battery kill the main battery over time? I've got a battery drain on the main battery that I've replaced twice. I've never replaced (or tested) the second battery and my Cayenne's a 2004.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.