Thanks for that. Working round the showers today.
Decided to concentrate on the brake light fault - have no access to code reader today anyway.
I have the haynes manual wiring diag in front of me and looking at the ext lighting, 2.2l models
It shows the 4 contact switch as follows. contact 1 & 2 normally open and contact 3 & 4 normally closed.
1 -ye/rd
2 vt/wh
3 bn/gn
4 bk/gy
When I look at the plug on the van I see
1 ye/rd
2 bn/gn
3 bk/gr
4 vt/wh
When I test for 12v with ign on I get 12v on pin3 of the plug(br/gn). ? and haynes diag shows as coming from the power control module.
When I test the sw I find 2 - 3 normally open and 1 -4 normally closed. Switch works fine.
So I conclude that the plug wiring in the van must be good since its always been like that and...
The haynes manual wiring diagram must be incorrect.
Or/And I must have the wrong switch. Haynes manual clearly shows a different wiring for the 2.0l model.
Question - where is the power control module?
Oh and with the ignition on the output at the pin with the br/gn wire which I have assumed is pin3 (depending on whether you number from L to R or R to L) is 11.4v. If I start the engine it 13.6v Battery voltage is 12.6v and 13.9 with engine running.
I hope you can make sense of all this. I shall ring the motor factor place and see if there is a different switch for the 2.0l model.
Thanks again for your help.