Intermittent fault reversing camera

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Post by gassygassy on Fri Dec 20, 2019 12:47 pm

Sparks wrote:It is possible to fit a twin lens camera in place of the VEBA unit using the existing wiring. The wiring on my Bourton is 4 core, two video wires, one neutral and one positive, on the VEBA unit only one video wire is used. You will need to access the back of the existing camera to remove the retaining nut and disconnect the wiring, you will also need to remove the internal light at the front to access the wiring to the monitor and remove a connection box and modify the wiring. Incidentally the VEBA camera is only fixed to the fibre glass, I bonded in a short piece of wood to secure the twin lens cameras which are much heavier that the existing camera. Good luck
Thanks Sparks, if I could remove the existing camera and use the wiring that would be a wonderful bonus. The question is how do you remove the existing camera? I have gripped it as tight as I can and tried twisting it but cannot budge it. I am competent at wiring and electronics so the rest of it would be easy once I could get the existing camera off. I can't see any way of getting to the inside of the camera. (2015 Nuevo)
The only thing I can think of is to carefully measure the inside of the top cupboard over the cooker extractor, and drill a hole inside there to access the back of the camera.
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Post by Peter Brown on Fri Dec 20, 2019 1:23 pm

Not a specific answer to anyone but some notes on the Veba system/installation:

To access the rear of the camera on a panel van, remove the high level brake light; on most coachbuilt’s you will need to cut an access panel in the back of a locker.

The cable from the power supply/control board to the camera contains a voltage converter, I believe from 12v to 5v and is bespoke to the Veba system.

On my van (2011 Mercedes) the power supply/control panel is above the cab interior light alongside the unscreened connection between the radio aerial and down lead to radio. The radio interference produced by the power supply swamps the signal from the aerial resulting in poor FM radio performance and frequent loss of satellite signal to Satnav. After over a year trying to suppress this, an isolation switch was fitted in the 12v supply to the power supply and the reversing camera system is only activated when needed for reversing.

The 12v feed for the power supply/control panel is taken from the 12v supply to the fridge in the EM50. There are no guides for the fuse blades on the EM50 so it is possible to have one blade located properly and the other making contact on the outside of the socket and being intermittent when the vehicle is in motion.

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Post by Sparks on Fri Dec 20, 2019 3:12 pm

On my Bourton I have a removable plastic cover approx 3" in dia in the cupboard over the extract fan, if you do not have this then unfortunately the only to access the back of the camera and wiring is to cut a hole  in the back of the cupboard. The camera is retained by one nut and spring washer so is virtually impossible to remove from outside. If I knew how I would attach a photo.
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Post by Sparks on Fri Dec 20, 2019 3:56 pm

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Post by marconi on Sun Dec 22, 2019 12:45 pm

Peter Brown wrote:Not a specific answer to anyone but some notes on the Veba system/installation:

To access the rear of the camera on a panel van, remove the high level brake light; on most coachbuilt’s you will need to cut an access panel in the back of a locker.

The cable from the power supply/control board to the camera contains a voltage converter, I believe from 12v to 5v and is bespoke to the Veba system.

On my van (2011 Mercedes) the power supply/control panel is above the cab interior light alongside the unscreened connection between the radio aerial and down lead to radio.  The radio interference produced by the power supply swamps the signal from the aerial resulting in poor FM radio performance and frequent loss of satellite signal to Satnav.  After over a year trying to suppress this, an isolation switch was fitted in the 12v supply to the power supply and the reversing camera system is only activated when needed for reversing.

The 12v feed for the power supply/control panel is taken from the 12v supply to the fridge in the EM50.  There are no guides for the fuse blades on the EM50 so it is possible to have one blade located properly and the other making contact on the outside of the socket and being intermittent when the vehicle is in motion.

I checked my EM50 fridge fuse, all is OK there. One would expect another suitably rated fuse in the camera feed for safety, there is no indication of one and of course no wiring schematic or physical layout diagram. The problem could be due to failing supply voltage or video of course, I have now observed the off and on periods for several hundred miles and some very bumpy roads, on no occasion have the offs or ons seemed related to vibration or jolts from bumps.
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Post by gassygassy on Sun Dec 22, 2019 4:03 pm

Sparks wrote:On my Bourton I have a removable plastic cover approx 3" in dia in the cupboard over the extract fan, if you do not have this then unfortunately the only to access the back of the camera and wiring is to cut a hole  in the back of the cupboard. The camera is retained by one nut and spring washer so is virtually impossible to remove from outside. If I knew how I would attach a photo.
Hi Sparks, is there any chance you could post a photo of the plastic cover, and the dimensions from its centre to the sides of the cupboard please? I can cut a circular hole OK, but I wouldn't want to cut it in the wrong place! I would want to find a nice bit of some sort of material to make the 'inspection hatch' as well.
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Post by Sparks on Mon Dec 23, 2019 6:53 pm

Hi Gassy Gassy. I will try and attach a few photo's and supply below the dimensions you requested.
LH wall to centre of hole.  155 mm
Bottom of cupboard to hole centre. 225 mm
Bottom of cupboard to camera centre. 200 mm
Hole dia approx.  87 mm
Wall thickness. 30 mm
Centre of camera outside from window surround. 285 mm
I hope this will helpful
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Post by gassygassy on Mon Dec 23, 2019 11:31 pm

That's brilliant Sparks, thank you. I think the back of the Bourton is the same as the Nuevo, I will take measurements from the rear window frame and check they match with yours before drilling.
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Post by inspiredron on Tue Dec 24, 2019 12:41 am

Gassy - if you look under the shelf below your microwave you may well find one of those covers blocking an access hole at the rear left side of the shelf. That may give you what you need to block up the new and visible hole in the back of your cupboard above the cooker. Also, you might persuade A/S to send you one.
If I were you I would take all measurements from the window frame as well. On a 50mm plus hole any inaccuracies because of parallax are unlikely to matter. I will be replacing my camera in the spring but I have a smaller screwed plate and when I remove that I can see that Ma***is' contractor didn't bother with the nut!

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Post by gassygassy on Tue Dec 24, 2019 10:46 am

Thanks Ron. I think my layout might be different to yours - my microwave is above the cut glass glasses holder above the fridge, and there isn't any shelf or blanking plate. I'll have to find a suitable plug and then drill a hole to match that. I've got a Rowntrees Cocoa tin lid which of course is a cardboard tin and plastic lid. It's 72mm dia so I may well use that, if my hole saw collection has a matching one. I am wary that a) if you choose the wrong size hole saw you may not find a lid to plug it with, and b) if you cut a hole too small it will be extremely difficult to enlarge it and even then you wouldn't find a plug to match. Then you would need to just screw a rectanguar plate over the hole of course. In fact if you could find a matching piece of board that would be better than a cocoa tin lid. Happy Christmas: I won't be doing the job before then anyway. cold
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Post by Sparks on Tue Dec 24, 2019 11:44 am

Hi Gassy. Just a thought under the off side seat on the Bourton there is a plastic cover over the access hole to the pressure regulator exactly the same as the one you want, I think you are correct and the Neuvo & Bourton are similar, so as Ron suggested you could try A/S Spares Dept.
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Post by inspiredron on Tue Dec 24, 2019 1:46 pm

I haven't got on open shelf either but the microwave sits between two dividers which are part of that full height fridge/glasses store/ microwave/wall cupboard full height unit. Yours sounds the same as mine. Look up, above the glasses - back left. It's an access hole on mine, presumably to assist with wiring in conjunction with the rectangular vent that lets in air behind the microwave. I used the hole for wiring a double mains 13A socket with 4 USB charging points. It didn't matter that it is surface mounted on the underside of the "shelf" and over the hole!

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Post by gassygassy on Tue Dec 24, 2019 10:30 pm

Thanks Sparks and Ron. I'll take a look in the glasses box. When we bought our Nuevo it didn't have any glasses, which doesn't matter to us as we don't sit around sipping sherry with little fingers stuck out so we use that space as a book shelf. I'll tip it all out and investigate, and meanwhile can I wish you all a very Merry Christmas and a Happy New Year.
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