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About FlyingTog

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    Always Thinking...
  • Birthday 13/01/1961

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    Flying, Photography, Caravanning, Land Rovers

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  1. Hi MPDT You might want to read through this. .. http://caravanchronicles. com/guides/understanding-the-leisure-battery-charging-circuit/ Part way down there might be the explanation to your question. It was also raised in Land Rover Owner magazine. Simon (Flying Tog) Caravan Chronicles
  2. Quick thanks to those who posted links to my blog, cheers, guy's. I'll make the assumption that the caravan was connected to the tow vehicle and the ignition was off. This could be down to a fault in the tow vehicle where the two circuits (fridge and leisure battery charging) are linked (a short between the two) a quick check with a volt meter checking that they operate correctly (see testing a 13 pin socket post in the help section of my blog) It might be that the fuse that was blowing was supplying both the charging circuit and the fridge circuit rather than one fuse in each circuit. I would tend to suspect that the current rating you observed was the sum of the general caravan electrics being powered up and the fridge being powered on battery at the same time. This could be due to the battery charging circuit being coupled to the the fridge circuit. This could be down to a fault in the tow vehicle where the two circuits are linked (a short between the two) a quick check with a volt meter checking that they operate correctly (see testing a 13 pin socket post in the help section of my blog) If the vehicle checks out OK then the next test would be to check the caravan side of things, check the resistance between the 12 volt feed for the fridge circuit and the 12 volt feed for the battery charging circuit at the 13 pin plug… it should be 0 ohms, the two should not be connected. As there isn't a 12 volt feed on the fridge circuit to operate the habitation relay, then the relay should not operate and there should be no connection of the charging circuit to the leisure battery. This proves everything up to the habitation relay. From there you need to check the correct operation of the habitation relay when the fridge circuit is being powered. Sometimes it's helpful to do a quick basic drawing of the circuits and just mark on each section as you test it. Hope this helps Simon
  3. I didn't realise this morning when I wrote the short article that Doosan linked to in the first post that it would have caused so many comments. I'm not going to comment on the rights/wrongs/blame aspect. The only thing I would say after watching the video several times (and it took me a couple of days to decide if to publish or not) is maybe a safety improvement could be made by sites checking the line-of-site at junctions similar to the one in the video. I'm sure that there must be rules for the highway about line-of-site at junctions. Maybe if the hedge had been cut back several feet or lowered to maybe 18 inches high could have affected the outcome. I would suggest that if you see such an obstructed junction on a site, that it is brought to the attention of the owners/wardens. Simon
  4. Hi carabiiker Any chance of a copy of the 12v manual. Trying to assist someone that contacted me via my blog. I'll PM you my email address. Thanks Simon
  5. I wrote about this a couple of years ago. .. http://caravanchronicles. com/guides/the-13-pin-plug-puzzle/ I was the one that got the importers of Menber products to start importing the green cap and I think if I remember right, Chris at Lodge Farm Leisure was the first person to stock the caps when the initial batch of 1000 came in to the country. S
  6. I wrote this a while ago: http://caravanchronicles. com/2014/08/20/why-do-my-sidelights-flash-when-i-indicate/ Maybe it can help in diagnosing your problem. Simon
  7. I know this thread is over 12 months old, but one of the most common questions I get asked is how to check the fridge circuit so I have recently added a new page to my blog detailing how to check your caravan fridge circuit and calculate the voltage drop on each section to confirm how well it's working. .. or not. http://caravanchronicles. com/guides/caravan-fridge-circuit-tracing-a-fault/ I hope it helps anyone who has problems. Simon
  8. To avoid any ambiguity when having a towing electrical package installed it should be specified you want it doing to the current version ISO 11446-1 I detailed the spec of here as the full version is only available for payment of a fee. ... http://caravanchronicles. com/guides/iso-11446-13-pin-trailer-connections/ Simon
  9. I think that is what I said. The ISO spec details that pin 12 is linked to pin 3 within the 13 pin plug so as to provide an earth return path for the vehicle detection system which looks for an earth on pin 12 of the plug when it is coupled. The switched sockets were originally designed for vehicle manufactures that had trailer stability assist and ABS trailer sense as pre the latest ISO 11446 standard pin 12 was undesignated and as such manufacturers of vehicles were not allowed to use this pin for anything. Therefore they had to incorporate some form of detection. . i. e. microswitches that would detect the presence of a trailer plug. This caused some problems with vehicles that were fitted with bike racks that had a light board fitted. The vehicle would think that a trailer was attached and adjust the TSP and ABS accordingly which was problematical and some drivers reported adverse affects. As the standard only defined the use of 12 pins, cable manufacturers only produced 12 core cable, with the exception of some markets where a variant of the 13 pin plug was used for military use (ISO 11446 - 2) which was fully waterproof (sometimes designated "for wading use") The extra core was to power the convoy lights. So initially 12 core was the only cable available in the UK and only subsequently has 13 core become widely available, but as the latest ISO 11446 spec says pin 12 is connected to pin 3 and this can be done within the plug, 13 core cable is not really required. S
  10. All 13 pins are used. If you check ISO 11446 the latest version it gives all the functions of the pins. .. details here http://caravanchronicles. com/guides/iso-11446-13-pin-trailer-connections/ You only need 12 core cable as pin 12 is connected to pin 3 within the plug for trailer sensing. ATC should be connected to the permanent live only, it should also not be on a circuit controlled by a split charge/voltage sensing relay. S
  11. Operator error can exist for caravan hitches, so why not detachable tow balls? Clearly this chap had an issue. .. http://www. talkford. com/topic/182311-my-ford-detachable-towbar-tried-to-kill-me/ As for your comments WP Well I do actually vaguely know the lady involved, as she is one of many that pass on a regular basis, and I found out the additional information is a subsequent conversation with her and her husband. No they don't tow anything other than the horsebox they use for their daughters pony. I have no feelings for or against detachable tow bars, and your claim I am biased is unfair as you don't know me or any of the vehicles I have driven and towed with, which do include those with detachable tow bars. I only offered up the comments as a fair balance. I still state if anything is designed to be detachable, then it can become detached when not intended, Obviously you have a problem when differing or opposing views are offered up, therefore I will refrain from posting any further. I will avoid "Windy Poodle" as others do. S
  12. Don't attempt Porlock Hill ! You will need to go the long way round.
  13. So, what about the odd caravan that becomes detached then? These have 'interlocks' that are supposed to stop it becoming detached, but someone in the past deemed it could happen and legislated for the breakaway cable. Just past our house we have a farm that has stables. A year os so ago right outside my office window, a BMW 4 x 4 which I have seen on many occasions was passing towing an Ifor WIlliam twin axle horse box. There was a bit of a clunk and a short tyre squeal and the horse box was partly on the pavement. I went out to investigate and was confronted with the sight of the horse box still attached the the tow ball. .. which was not attached to the vehicle. Thankfully the horse box only had bails of hey in it. I spoke to the lady driving the BMW and long story short, the removable tow ball was installed on the vehicle new and in the three years they owned it had never removed the tow ball but know that it had been serviced by the BMW dealer at each service. During the time they owned the vehicle they had towed the horse box all over the north west attending horsey events. I know nothing of the BMW removable hitches or how they are secured, but as I said if something is designed to be detachable at some point it is going to become detached just when you don't want it too. To believe otherwise is very short sighted. On your point of nuts and bolts. ... generally they are not designed to be detachable, but removable - there is a difference, usually with the use of tools and there are very good methods of making sure they can't remove themselves.
  14. Indeed, all good stuff. But. .... if something was designed to be detachable at some point it is going to become detached just when you don't want it too. .... like the caravans that are supposed to be attached to the tow ball and occasionally drop off. S
  15. The down side is if you read some of the horsey forums, there are quite a few that have come detached when they shouldn't while towing horse boxes and horses getting injured. S
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