I'm installing a second battery in my 09 T5 Transporter. I can't find a 12v power source for the isloator unit that is linked to the ignition. Any suggestions? Appreciate the help.
Above Forum Ad
Collapse
Announcement
Collapse
1 of 2
<
>
Email Notifications Failing (mostly Telstra)
Hello everyone. Seems there is an issue with Telstra (possible others) blocking email from our server. If you are trying to sign up I would suggest a different email if possible. If you're trying to reset your password and it fails please use the Contact Us page:
2 of 2
<
>
Welcome to the new look VWWatercooled
After much work and little sleep there is a new version of the forums running on more powerful and recent hardware as well as an upgraded software platform.
Things are mostly the same, but some things are a little different. We will be learning together, so please post questions (and answers if you've worked things out) in the help thread.
Things are mostly the same, but some things are a little different. We will be learning together, so please post questions (and answers if you've worked things out) in the help thread.

The new forum software is an upgraded version of what came before, it's mostly the same but also a little different. Hopefully easier to use and more stable than before.
We are learning together here, so please be patient. If you have questions, please post them here. If you have worked something out and can provide an answer,
See more
See less
help- 12v source for 2nd battery isolator.
Collapse
X
-
This may help. Under the front passenger seat there is a bunch of connectors.
I have bench seat so it may look differently but you're looking for that colour connector and use multimeter to confirm that it is a right wire. There should be +12V when engine is running and 0V while cranking (very important!)
I used 12V to 12V battery charger that way the second battery is always charged up to 20A and didn't need h/d wires to connect. Disadvantage is it can't be used for emergency start up.
Last edited by Transporter; 18-11-2010, 06:05 AM.Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
Comment
2025 - Below Forum
Collapse
Comment