Home

   Log in or Register



Insurance Quotes
forums Campsite Search Comp Directory tips virtual brochure Profile
Tent and Awning Reviews Competitions Caravans and Motorhomes For Sale Shopping Diary Contact Us

Advertisement

Message Forums

Welcome Guest Register Login Search The Forum Posts Since Last Visit
 Reception - All Forums
   Caravans and Caravanning -  Caravan Towcars and Towing Advice
Share   Post on X / Twitter  Share on Facebook  Email  Printer Friendly Version Print
Subject Topic: Car/Caravan unit hooked up overnight Post Reply Post New Topic
15/5/2024 at 11:20am
 Location: Morayshire
 Outfit: Coachman Highlander
View Grayhair's Profile View Profile   Reply to Grayhair Reply   Quote Grayhair Quote  
Joined: 24/8/2023

Standard Member
Standard Member

Forum Posts:   38

Site Reviews Total: 4
Site Reviews 2024: 2  
Site Reviews 2023: 2  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 5
Site Nights 2023: 9
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

I read somewhere that if one leaves the car hooked up to the caravan it can drain the car's battery, is this correct?

I am intending getting the car and caravan all hooked up the night before we leave on our next trip, so we can have an early start, is it OK to hookup the electrics?

We're going to Loch Ness Shores and I believe it's mostly single track roads to the campsite, that should be fun, hence the early start.


-------------
2011 Coachman Highlander 450/2, towcar 2018 Renault Kadjar Signature Nav 1.6dci 130bhp 4WD


via mobile 15/5/2024 at 11:37am
 Location: 
 Outfit: 
View Dave and Cyn's Profile View Profile   Reply to Dave and Cyn Reply   Quote Dave and Cyn Quote  
Joined: 23/7/2018

Silver Member
Silver Member

Forum Posts:   199

Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Possibly!
Why not play safe? Hitch up but leave the electrics unplugged until the morning.
Cover the steering wheel with a towel or something to act as e reminder.


15/5/2024 at 1:24pm
 Location: Worcestershire
 Outfit: Buccaneer Cruiser
View iank01's Profile View Profile   Reply to iank01 Reply   Quote iank01 Quote  
Joined: 30/6/2004

Diamond Member
Diamond Member

Forum Posts:   3984

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 1  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 10
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

If the fridge is switched off it should not be an issue. When travelling to Spain or France we leave the car hooked up to the caravan.


15/5/2024 at 3:21pm
 Location: London
 Outfit: Lunar Cosmos 524
View Monty15's Profile View Profile   Reply to Monty15 Reply   Quote Monty15 Quote  
Joined: 17/9/2015

Diamond Member
Diamond Member

Forum Posts:   2134

Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 1  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 6
Site Nights 2018: 0

Think it depends on the age of the caravan AND/OR car! Believe older caravans did not isolate from car supply as well as newer ones do, but can't put dates on it! The towbar wiring has changed a number of times over the years, far more than the simple 7pin to 13 pin socket upgrade! Again, modern cars pretty much shut down ALL electrics when engine off, but not necessarily so with older ones. The fridge 'should' only be supplied from the tow bar electrics when the engine running, it's a high demand load. There is a permanent 12v supply on socket pin 9, but doesn't appear to connect to anything on my van!

I'd play safe, just unplug the towbar electrics, BUT drape a duster or something over the steering wheel to remind you to reconnect before driving off!


15/5/2024 at 3:27pm
 Location: Morayshire
 Outfit: Coachman Highlander
View Grayhair's Profile View Profile   Reply to Grayhair Reply   Quote Grayhair Quote  
Joined: 24/8/2023

Standard Member
Standard Member

Forum Posts:   38

Site Reviews Total: 4
Site Reviews 2024: 2  
Site Reviews 2023: 2  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 5
Site Nights 2023: 9
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Quote: Originally posted by Dave and Cyn on 15/5/2024
Possibly!
Why not play safe? Hitch up but leave the electrics unplugged until the morning.
Cover the steering wheel with a towel or something to act as e reminder.


Quote: Originally posted by Monty15 on 15/5/2024
Think it depends on the age of the caravan AND/OR car! Believe older caravans did not isolate from car supply as well as newer ones do, but can't put dates on it! The towbar wiring has changed a number of times over the years, far more than the simple 7pin to 13 pin socket upgrade! Again, modern cars pretty much shut down ALL electrics when engine off, but not necessarily so with older ones. The fridge 'should' only be supplied from the tow bar electrics when the engine running, it's a high demand load. There is a permanent 12v supply on socket pin 9, but doesn't appear to connect to anything on my van!

I'd play safe, just unplug the towbar electrics, BUT drape a duster or something over the steering wheel to remind you to reconnect before driving off!



Good advice folks I'll do just that, although I'll probably wonder why there's a duster on the wheel
It's an old caravan 2011 but it has the 13 pin plug, the car is 2018 with a 13 pin socket but I won't take the chance....I'll disconnect!
Thanks very much for the advice.


Post last edited on 15/05/2024 15:36:40

-------------
2011 Coachman Highlander 450/2, towcar 2018 Renault Kadjar Signature Nav 1.6dci 130bhp 4WD


Advertisement



15/5/2024 at 6:07pm
 Location: 
 Outfit: 
View marg6's Profile View Profile   Reply to marg6 Reply   Quote marg6 Quote  
Joined: 11/8/2016

Diamond Member
Diamond Member

Forum Posts:   2941

Site Reviews Total: 3
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 3  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 15
Site Nights 2018: 0

2011 is not an old caravan! the others where meaning more your 2000's or before. also, its a 2 hr drive on not to bad roads, even the single lane part isnt that narrow. surely it would be safer to leave the caravan at your normal storage until the day of deparature i personally would not leave my car and caravan hitched and unattended, even f it was outside my house


15/5/2024 at 11:42pm
 Location: Lichfield
 Outfit: Coachman Amara 450
View tango55's Profile View Profile   Reply to tango55 Reply   Quote tango55 Quote  
Joined: 15/5/2008

Diamond Member
Diamond Member

Forum Posts:   9580

Site Reviews Total: 23
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 1  
Site Reviews 2020: 0  
Site Reviews 2019: 4  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 11
Site Nights 2021: 3
Site Nights 2020: 0
Site Nights 2019: 24
Site Nights 2018: 0

All you have to do is connect up the electrics to the vehicle towing socket then drop the caravan battery box door down and take a reading of the battery voltage at the battery terminals which would normally be around 12.9 volts. Start up the vehicle engine and then take another reading which should be higher around 14 volts. Switch off the engine and remove the key and if the voltage reading returns to the first reading then it proves that the power from the car to the caravan has been isolated.


16/5/2024 at 12:38pm
 Location: London
 Outfit: Lunar Cosmos 524
View Monty15's Profile View Profile   Reply to Monty15 Reply   Quote Monty15 Quote  
Joined: 17/9/2015

Diamond Member
Diamond Member

Forum Posts:   2134

Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 1  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 6
Site Nights 2018: 0

Quote: Originally posted by tango55 on 15/5/2024
All you have to do is connect up the electrics to the vehicle towing socket then drop the caravan battery box door down and take a reading of the battery voltage at the battery terminals which would normally be around 12.9 volts. Start up the vehicle engine and then take another reading which should be higher around 14 volts. Switch off the engine and remove the key and if the voltage reading returns to the first reading then it proves that the power from the car to the caravan has been isolated.



Not necessarily, the fridge and charger supplies can be different (different pins on the socket)! Granted, the fridge supply SHOULD switch off with the ignition, but without checking the actual socket and that it functions in accordance with convention, it's a slightly risky assumption. There seem to be more than enough people with 'weird' wiring of sockets for various reasons, that assumption is a risk, plug out is a certainty!


16/5/2024 at 7:41pm
 Location: West country
 Outfit: Mondeo
View navver's Profile View Profile   Reply to navver Reply   Quote navver Quote  
Joined: 23/8/2008

Diamond Member
Diamond Member

Forum Posts:   4603

Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

That pin 9 permanent supply connects to the Alko trailer stability system on my caravan. It permanently draws current even with the ignition off and engine not running.

However, this system is only fitted on some newish caravans. Mine is 2015 and has it.



In order to post a reply you will need to register, or if already registered please log in here

Prev       Next
Quick Links - All Forums - Caravan Towcars and Towing Advice - Top of Page

Printer Friendly Version Printable version      Share   Post on X / Twitter  Share on Facebook  Email


Latest News, Discounts and Competitions  see all...














3470 Visitors online !

Free UKCampsite.co.uk Window Sticker  -  Recommend to Friend  -  Add a Missing Campsite

[Message Forums]  [Caravan Sites & Camping]  [Company Listings]  [Features / Advice]  [Virtual Brochure]  [Shop!]
[Reception]  [Competitions]  [Caravans & Motorhomes For Sale]  [Event Diary]  [Contact Us]  [Tent Reviews



Please note we are not responsible for the content of external sites & any reviews represent the author's personal view only. Please report any error here. You may view our privacy and cookie policy and terms and conditions here. All copyrights & other intellectual property rights in the design and content of this web site are reserved to the UKCampsite.co.uk © 1999 - 2024


Advertisement



Advertisement



Advertisement