Member Since: 05 Mar 2006
Location: Warwickshire
Posts: 18
12 volt socket in the boot and my electric cool box
Hi guys can any body help me. I have and electric cool box that has a 12 volt plug (cigerete lighter type) that i use in the boot conecting it to the out put socket in the boot.
I was reading the instruction on the cool box. It apparently it has some kind of system that monitors the battery and will automatically shut it down rather than flaten the battery.
As we are going camping I would like to use the coolbox as a tempory fridge but the socket only has power when the ignition is swiached on. can this be changed to be permantley live?
18th May 2008 8:11 pm
MW
Member Since: 08 Dec 2005
Location: Huntingdon
Posts: 35
You can change this very easily, i have a 80 litre fridge engal which hits the auxilary 12v, but if you have a hunt behind the socket, i.e. where the removable tow bar sits when detached you can find a permanent feed. i used the one for the caravan electrics and wired it hard in. It always stays live when the ignition is off. If you want more info i will take a pic tomorrow as i cant remeber off the top of my head, i think i put a fuse in as well for peace of mind.
18th May 2008 8:47 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Re: 12 volt socket in the boot and my electric cool box
warrenyates wrote:
I was reading the instruction on the cool box. It apparently it has some kind of system that monitors the battery and will automatically shut it down rather than flaten the battery.
Hi warrenyates, if your fridge has selectable cut-out voltages, make sure you select one for no lower than 12 volts or your going to have problems.
Many fridges have a 10.5 cut-out and this will give you virtually a flat battery.
It would pay you to check your fridge settings before you do anything else.
Cheers.2008 TDV8 RR Lux + 2009 D4 2.7
18th May 2008 9:34 pm
Ken
Member Since: 20 Feb 2006
Location: Here
Posts: 10865
Get a second battery fitted it may be cheaper than you think.
I think I've heard of a top bloke called TFC (10forcash) who does this sort of thing to a very very high standard
19th May 2008 6:15 am
TallPaul
Member Since: 03 Jan 2008
Location: Near Reading
Posts: 1214
Ken wrote:
Get a second battery fitted it may be cheaper than you think.
I think I've heard of a top bloke called TFC (10forcash) who does this sort of thing to a very very high standard
Don't forget there is a group buy running at the moment for optima batteries, perfect spec and size to fit the spare space under the bonnet Disco3 is now gone but not forgotten. Waiting for Disco6 with full aluminium construction weight reduction and hybrid engine...
19th May 2008 1:00 pm
britindus
Member Since: 25 Apr 2008
Location: Christchurch
Posts: 193
whatgoeshere wrote:
Ken wrote:
Get a second battery fitted it may be cheaper than you think.
I think I've heard of a top bloke called TFC (10forcash) who does this sort of thing to a very very high standard
Don't forget there is a group buy running at the moment for optima batteries, perfect spec and size to fit the spare space under the bonnet
Arhh tell me more!!
2 of us looking for second battery systems!
both V8 HSE G4 D3s
thanks!
Simon
19th May 2008 8:25 pm
gilmore
Member Since: 16 Jan 2005
Location: On the sofa
Posts: 2185
cheers
robAll opinions expressed in this posting are my own and are not necessarily those of someone who knows what they are talking about.
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19th May 2008 8:53 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Thinking ahead, can a 12v feed (switched by ignition) easily be taken from behind the aux socket to drive rack lights (with a switch/relay/fuse etc)
I'm looking at the route out through the bodywork behind a rear light and up the side of the tailgate openingSteve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
19th May 2008 8:57 pm
Bodsy Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
I thought this was the TFC prefered route? Thought both DiscoStu & BCB have this route?Bodsys Brake Bible
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19th May 2008 9:00 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
I know TFC's route is that - its where the 12V starts from - and where a switch would go (not going down the complicated BCB route having seen his red electrical tape nightmare yesterday )Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
19th May 2008 9:06 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Bump - can anyone tell me which wire to cut into behind the 3rd row aux socket to get the switched 12v ? Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
24th May 2008 8:59 pm
DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
This is what I'm thinking...
Just a single line switched to earth along length.
What I don;t know is what size Fuse 1 & Fuse 2 I should use and which wire to tap the 12V from
Hopefully someone knowledgeable will be along to say "that'll work" or "that's a fire hazard" and the little bit of info on fuses and wire Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
24th May 2008 9:21 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Hi SN, I’m not sure how thick the wire is in the D3’s plug you are talking about but you will need at least 8B&S ( 7.9mm2 ) cable otherwise your lights will run dull yellow because the voltage drop thinner wire will induce on the cable run.
You only need one fuse, a 25 amp fuse will be fine for 4 x 55w globes which will draw about 16 amps total ( and depending on the thickness of your cable ).
You run your power feed to the 25 amp fuse then to pin 30 on an automotive type relay.
You then run a link, using thin wire, from pin 30 to pin 85.
You then run the power output from pin 87 to your lights.
you run a thin wire from pin 86 to your switch and then to earth.
The link below will give you an idea of the pin configurations for commonly available automotive type relays.
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