Anyone know if i plug in a 12volt cool box to my volvo cigi lighter if it will fry it or not 
last time i looked it was 24v, safe one is marked 12v.
Model & age ?
Older FM & FH the lighter socket is usually 12V with 24V on the back wall, but you have to check for yourself .
Newer FM & FH there are two sockets lighter is 24V and thereās another thatās 12V, far as I know.
DAFMAD:
Model & age ?Older FM & FH the lighter socket is usually 12V with 24V on the back wall, but you have to check for yourself .
Newer FM & FH there are two sockets lighter is 24V and thereās another thatās 12V, far as I know.
Its V reg mate but i use a satnav so surely that must mean its a 12volt
the lighter socket on newer fm/fh are marked but the one nearer passenger side is normally 12 volt.
sat nav can run off 12v and 24v.satnav usally have it marked on power cable if it is 12/24 volt check for your own safety.
thecoder0:
DAFMAD:
Model & age ?Older FM & FH the lighter socket is usually 12V with 24V on the back wall, but you have to check for yourself .
Newer FM & FH there are two sockets lighter is 24V and thereās another thatās 12V, far as I know.
Its V reg mate but i use a satnav so surely that must mean its a 12volt
most sat navs use a power rating from. about 6 volts upto 30 volts ,so dont use that as a measure, best bet is to get an electrician to check it .
thecoder0:
DAFMAD:
Model & age ?Older FM & FH the lighter socket is usually 12V with 24V on the back wall, but you have to check for yourself .
Newer FM & FH there are two sockets lighter is 24V and thereās another thatās 12V, far as I know.
Its V reg mate but i use a satnav so surely that must mean its a 12volt
I can plug mine in 12 or 24V, so I donāt think you can go by that, as said
V-Reg is the FH 1, 24V on the back wall.
Just bear in mind everyone, that most are like that, but, some could have been altered.
Donāt be a tight wad,and buy a Ā£4.99 multi meter off your local market,then you can check any vehicle that you get into.
Ken.
^^^^ HOW MUCH Ken ā ā ? Last one I got on sale was an extortionate Ā£2.49. Surely there must be something in the pound shopā¦
macplaxton:
^^^^ HOW MUCH Ken ā ā ? Last one I got on sale was an extortionate Ā£2.49. Surely there must be something in the pound shopā¦
You can do it cheaper than that, 1x 24 volt bulb, 2 bits of wire. Attach wires to bulb and make contact with socket. If it is 24 volts bulb is bright, 12 volts it isnāt. Job done.
Coffeeholic:
macplaxton:
^^^^ HOW MUCH Ken ā ā ? Last one I got on sale was an extortionate Ā£2.49. Surely there must be something in the pound shopā¦You can do it cheaper than that, 1x 24 volt bulb, 2 bits of wire. Attach wires to bulb and make contact with socket. If it is 24 volts bulb is bright, 12 volts it isnāt. Job done.
i thought i was the only one tight enough to do it like that
Q suggestās EXTREME CAUTION
As it un-usual to find any 12 Volt sockets fitted in any wagon above 7500kg mass (including new ones)
Usually ALL the āHGVāsā have 24volt Cigaretteālighter & Hela sockets // unless marked otherwise
If your considering probing around to test the voltage
BEWARE // They pack quiet a PUNCH
( Poking around using odd pieces of wire or Test-Meter probes)
** !! NOT RECOMENDED !!**
The initial ( short-circuit ) peak current, could be hundreds of AMPS
during the 0.5(ish) Second it takes for the fuse to blow.
SO: (assuming a higher rated fuse hasnt been fitted by mistake)
at BEST, there will be a short shower of white hot sparks.
AT WERSE, there be a longer shower of white hot sparks,
the āleadsā will weld to the connection, and then melt in your hands !!
Serious damage could quickly follow
As the wagons other electical wiring also joins in the display
Either way ( Double NOT-Recommended)
as your āhandsā/fingers & face/eyes are likely to be in close proximity
And if you start an electrical fire, your going to need to make a quick exit 
The best and safest option is to carry a voltageādroper / convertor.
( fitted with a universal plug (ie fits Cigy lighter or Hela))
This is a good one // costs about Ā£20
maplin.co.uk/Module.aspx?Mod ā¦ r&doy=30m6
Also available from TruckāStops // there is a also a lower power (5A) version
[ Also see previous tread trucknetuk.com/phpBB2/viewtopic. ā¦ highlight= ]
As it comes with a universial plug (fits correctly into either type of socket)
It also makes a great (safe) āTest the Voltageā device,
** Just plug it in **
If the cooling fan spins up, and the light comes on
Then you just pluged it into a [live] 24Volt Socket
If nothin happens: Either:
The socket is Dead (not live, try turning on the ignition)
Or its a 12 volt socket.
Regards 2xQ
PS: āAnyone know if i plug in a 12volt cool box to my volvo cigi lighter if it will fry it or notā
2Qās answer: Good Chance it will be a 24volt socket, so [YES] your roost the pumpāmotor
just use hella plugs. buy a twin ended converter lead 
no messing as those always seem marked up!