First of all thanks to everyone who has contributed. I think a little progress has been made by eagle eyes. so thank you. Todays findings are worth a mention.
So today I did as you asked and plugged the connector directly into the latch and found the following would only display on the measuring blocks.
When the connector is plugged directly into the latch as it should be.
I get open open when fully open. On vcds. Nothing from handle
I get closed closed on the first latch. On vcds .Nothing from the handle
I get closed closed on second latch. On vcds . Nothing from the handle
So again to test I installed another little jumper wire to test each wire (in the photo for reference) and response to the vcds and see what it registers. It seems that the latch isn’t doing this correctly. However no closed reading allows me to use the handle
On the tailgate to open the tailgate.
So here are my findings.
Closed closed when no wires are connected together at all
Open closed brown wire and the red wire connected. Handle operates and registers activated on vcds measuring blocks
Open open when both pins are connected to earth pin. So the brown and orange are connected to the red. Nothing from the handle.
Closed closed when orange wire is connected to red. Nothing from the handle.
Closed open when brown and orange are connected. Nothing from the handle
The only way I can get it to work is to simple connect the brown and red together.
The van state is open closed on the vcds. It will
Open when van is unlocked from
The handle but not when I lock the van. So it appears to be working. But shows the door as open in the vcds and also icon shows on the dash that a doors open.
Continuity check that the middle pin in the connector is earth with another earth in the tailgate. Get continuity so ( brown in the connector )is earth as it should be.
Now referring to the jumper wire colours :
The orange wire to earth showed resistance of 1230 on multi meter. The brown wire to earth shows no continuity.