Common ground on caravan for battery and towing vehicel

Masterplaster Guest #7095030
Rate this post
• ▲ useful
▼ not useful 
Hello everyone,

i want to have a batterie in my caravan.

At the moment there is only the power of the towing vehical on the input 
to the 12V "network".

I want to have also a battery. My plan is to switch of the battery when 
the caravan is pluged into the car. This should be done with a 40A 
relay.

My question is: is it nessesery to do it also with the ground wire, as 
in the attached drawing? Or does just one relay on the "powerline" just 
fit?

Is there a danger for the electronic in the car or the battery?

This is no advanced electronics question and i hope my english is good 
enough!

Hope to get help!
Attached files:
Reply Quote Edit Move Thread sperren Anmeldepflicht aktivieren Anpinnen Delete topic Thread mit anderem zusammenführen Report post
Watch this topic

Reply

Note: the original post is older than 6 months. Please don't ask any new questions in this thread, but start a new one.

Formatting
  • [c]C-Code[/c]
  • [code]code in other languages, ASCII drawings[/code]
  • [math]formula (LaTeX syntax)[/math]
  • [[Title]] – link to an article
  • Link to another post: right-click its post ID (#8078628), copy the address, paste it into the text

More about formatting

Post long source code as an attachment, not in the text.

Your name and e-mail address

Already registered? Log in

Not shown to anyone. We send you a link; your post appears once you confirm it there.

By submitting you create a free account and accept the terms of use.