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Elddis Firestorm 534


KeithJ
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greetings everyone, I am a new member as from 30/01/05 as you will see from the following post I have a couple of problems. I could take the easy route and contact my supplier but this post may help others.

I look forward to contributing to this forum.

 

After reading the manual on our 2004 Elddis firestorm 534, it states that the fridge would not work neither would the battery be on charge when connected to the car? Does anyone know if they mean when it's being driven or do they mean at anytime it's connected to the car? They don't say either way.

 

Also, I'm advised that the new wiring setup on modern vans (the 12S plug) requires an additional earth wire if this is the case can i use the unused brown wire? Does it have to run back to the battery or can I just make a sound earth to the body?

 

My wife and I are going to France in June so I need to sort the problem (went to France last year unaware that the wiring had changed). It may seem a long way off but in this weather It's hard to get motivated.

 

many thanks in advance keith :(

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Guest john1215

Keith,

 

The battery will only charge when you are driving if you have a suitable split-charge relay fitted that charges both the car battery and the caravan battery at the same time. I thought that the fridge should work though without any modifications but you have to set a switch inside the van for this to work, the location of the switch should be in your manual. On my van the 12 volt circuit to make the fridge work when travelling is just on the front panel of the fridge.

 

 

john1215

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Hi Keith,

 

Welcome to the forum.

 

The wiring standard on the 12S (white) plug was changed around 1998. Your new caravan will be wired to the new standard but if you previously had and older caravan your car may be wired to the old standard. This link details the two standards.

 

http://www. volvoclub. org. uk/towbar_electrics. htm

 

If your car is to the old standard, you need to add a wire from pin 7 (centre) of the 12S socket on the car to a suitable earth point on the car, using heavy duty wire. Without this your fridge will not work. The unused brown wire is still a spare and not used.

 

You do not now need a split charge relay for the battery charger as this is done by a relay in the caravan.

 

The way it should work is as follows

 

1. With the engine off and caravan connected. This supplies 12v to the caravan from the car battery excluding fridge and caravan battery.

 

2. Start engine. 12v supply to caravan electrics is switched off but 12v switched on the fridge and battery.

 

3. With caravan disconnected from car. 12v electrics supplied from caravan battery excluding fridge.

 

The fridge should only work on 12v when connected to the car with the engine running (and selected to 12v on the fridge switch)

 

There is no change to the 12N plug (black) which supplies road lights.

 

Hope this answers but if not come back and ask again if anything is not clear

 

Brian

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Thanks everyone for your replies. Brian you mention using a heavy gauge wire for the fridge earth, any idea's what size? It does'nt really matter if you dont know I've got some heavy cable in the garage.

 

many thanks keith B)

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I just mentioned heavy duty as the fridge takes quite a bit of current. I don't know exactly what the size is, but you can have a look a the size of the wire coming from your caravan to the plug and make it no less than that. If you use too thin a wire, you get a bigger voltage drop and the fridge does not perform very well.

 

Brian

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Hi Keith. .

 

I think you misread the book . .

 

"the 12v system with the exception of the 12v fridge & battery charging will not operate when . ....!

 

 

also, what the book doesnt say is that the paragraph actually means "when the engine is running"

 

also . . when you plug in to the car (engine not running), the caravan uses the car's battery for its 12v supply

 

 

cheers

 

B

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Hi Keith. .

 

I think you misread the book . .

 

"the 12v system with the exception of the 12v fridge & battery charging will not operate when . ....!

also, what the book doesnt say is that the paragraph actually means "when the engine is running"

 

also . . when you plug in to the car (engine not running), the caravan uses the car's battery for its 12v supply

cheers

 

B

8572[/snapback]

[Your absolutely correct old hand I did misread it I just got the book out again.

And no it does'nt say when the engine is running thats why my other brain cell was struggling.

 

many thanks keith :rolleyes: quote]

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I just mentioned heavy duty as the fridge takes quite a bit of current. I don't know exactly what the size is, but you can have a look a the size of the wire coming from your caravan to the plug and make it no less than that. If you use too thin a wire, you get a bigger voltage drop and the fridge does not perform very well.

 

Brian

8411[/snapback]

Thanks Brian, I'll do that (when the weather Improves).

 

many thanks keith

 

If anyone is Interested I tow my van with a 1998 3. 1 Turbo Diesel Isuzu Trooper. If any members have use one of these It would be nice to have a chat.

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I just mentioned heavy duty as the fridge takes quite a bit of current. I don't know exactly what the size is, but you can have a look a the size of the wire coming from your caravan to the plug and make it no less than that. If you use too thin a wire, you get a bigger voltage drop and the fridge does not perform very well.

 

Brian

8411[/snapback]

Hi brian

Have a look at the following links they explain the requirements for feding thn fridge and charging the caravan battery, details the relay required and explains how to over come the problems of burn out on the S

socketN & S sockets / relays http://www. towitall. co. uk/trailer_wiring/instructions. htm

 

N & S sockets http://www. oakwood-village. co. uk/MerchantM. ..1,86,97,104,108

 

Testing 7 pin sockets "N" & "S" http://www. caravanningnow. co. uk/caravanning/faq12s12n. htm

 

7 pin burn out Info http://www. towitall. co. uk/faq/faq1. htm

 

Sockets "N" & "S" http://www. stowford. co. uk/faultfinder/index2. asp

 

N socket http://www. swift-owners-club. co. uk/soc1/ti. ..ing_details. htm

 

S socket over heating http://www. swift-owners-club. co. uk/soc1/tips/12s_probs. htm

 

13 Pin Plug Details http://www. swift-owners-club. co. uk/soc1/ti. ..ing_details. htm

 

Wiring Diagrams http://www. towitall. co. uk/trailer_wiring/instructions. htm

 

2 nd Battery charging in boot of the Car http://www. caravanningnow. co. uk/caravanning/faqbattery. htm

 

Battery and charging in van http://www. stowford. co. uk/faultfinder/index2. asp

 

 

Dave

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