Technical 2.8jtd D+ circuit I'm going nuts

[merovingian]

Hi,
I have a 2005 Hymer B 584 fitted with a Schaudt EBL 101c electroblock and a Thetford Norcold 145 fridge freezer. I have a Oyster vision 3 sat dish system fitted and am lookiing for an ignition switched 12volt supply to connect to the Pin 15 security switch which shuts the dish down as soon as you start the engine (244 Ducato 2.8jtd).This is available on newer wagons but for the life of me all I can find are permanently live connections from my 2 gel batteries( I presume) either in the electroblock or behind the fridge.
I read that the D+ pin on the electroblock is blk 1 pin 2 but this is permanently live. The vehicle is LHD continental model.
The photo is the fridge/freezer connections it's all permanently live ffs!
HELP! This has me stumped and i'm beginning to lose faith in my own abilities
Thanks in advance for your kind assistance, fingers crossed!

 

[rayc]

How I think it should work: Looking at the Electroblok circuit on page 16 shows the D+ signal being received at the Electroblok SKT BL2 Pin 3 which has an output to the fridge on BL1 pin 2. Also the D+ output is on BL8 pin 15.
Internally it switches the fridge relay which feeds the cab battery to the fridge via BL2 Pin 1 which is fed to the fridge 12v element when the relay at the fridge receives the D+ signal.
All this with the engine running of course.

I think you could connect your dish to the step retraction circuit on Skt BL4 3+ / 6-.

http://www.vodeg.nl/_imagesCMS/Schaudt_EBL_101C_BA_EN.pdf


I hope this is helpful and am sorry if it isn't.

 

[rayc]

The fridge installation manual page 17 says the D+ signal is an orange wire. See section 7.3
https://www.campshop.nl/dbdocs/attachment_42.pdf

 

[merovingian]

The fridge installation manual page 17 says the D+ signal is an orange wire. See section 7.3
https://www.campshop.nl/dbdocs/attachment_42.pdf

So as this behind the fridge is the closest source ie 1 metre below and being inherently lazy

The D+ connection (orange wire +) ensures the DC heater can not be switched on (manual or
automatic) when the engine of the vehicle is not running.
Connect the D+ connection to a DC connection point that shows that the vehicle’s engine is
running (engine running: DC, engine not running: no voltage)
This connection is only used as a signal cable.
Signal cable would pass 12 volts anyway i'm presuming.
This orange cable would be the top left on the photo spaded to the Power Board ie Schaudt emd02 black box?

Failing that the connection board to the right is for the step (in the photo) and I will test that too to find the D+

If this works I shall add you to my Christmas card list

 

[merovingian]

Well, I eventually found it, my goodness it's easy when you know how! In fact its a yellow wire well hidden in a bunch of black cables to the right. In the loom well marked; you guessed it with D+ stamped along it. Fiendishly well hidden, obviously to confuse the DIY guy.

Many thanks to RAYC for the morale boost and advice you are a star sir.

It's started to get a bit dark and the rain has come back so I will finish off tomorrow.
There remains one question photo inclosed!
What do you call this type of connector and where online can I buy one, I actually only need one little bayonet connector to crimp on the wire and they are female about 0.5 mm's in internal diameter?