I seem to recall he cut the old roof off completely then welded a complete AFT roof with its double skin into place, but as I recall (it was around 2018) he got Karl Chadwick to sort out the wiring in the end as large parts of the loom wiring weren't present and needed adding, which probably ...

The only person I know who has done anything like this is Stuc on here, haven't seen him in a while here, but he is very active still on FB as Stuart Coates, I seem to recall he wasn't going to do one again either!

The wiring for a Sunroof is on that date of vehicle; and locations

So these are the details ?
Mazda Bongo Friendee, 19.06.1998
Grade: LTD Options: ｾﾞﾝｷｶﾞﾀ with sunroof diesel 2500 AT side ｽｶｰﾄ ﾅｼ normal differential A ﾌ"ﾚ-ｷ with 2WD with hyper seat
Frame/VIN: SGLW-202950 Manufactured: 19.06.1998 Trim: SC7 Color: A2T Seats: STC Doors: TDB

That says you have a ...

What is the VIN number either on the plate in the passenger door or stamped into the scuttle plate under the windscreen on the drivers side?
like

Given that your a 96 2.5Td 4 wheel drive - correct ?
Then the images below give the locaations;
X10 X22 X05

Yup I'm booked in direct at Looe as well so will see you all there.

Actually the Handbrake on signal is just an Earth from the brake switch, so that signal would continue to work its pulled up by the supply via the lamps themselves.

I have always suspected that the changeovers from one manual to the next were never as exactly matched on the production line! I suspect they continued to use old looms and things until they ran out and switched what was on the given line (there were most likely more than one lines as well!) so the ...

Yes in the 1995-5 to 1997-11 versions, the earliest diagrams. I scanned and loaded the first 3 manuals, but the very last one that Ian had 1999-9 they changed the entire format and totally revamped what was on each page, I gave up at that point as it meant starting from scratch again rather than ...

Ah yes 1996, I tend to look under 1997+ version!
There is the connector M2-04, they removed it in later versions, its now in the main loom!

Can't see that style of connector with just a Green and a White wire anywhere in the vehicle! Are you sure there is no stripe not visible in the photo to either wire ?
Green on its own tends to be the;
10 Amp Mini fuse
Air conditioning - Front Heater & Manual A/C Control System - WL-T, FE-E, J5-DE ...

There are maps available down here in the South I would almost use a tank full to get back home!
https://www.filllpg.co.uk/index.php?page=lpg.php

But you haven't told us which engine you have, it varies between diesel and petrol and also by year of van as parts have changed over the years.
It sounds like you have a faulty alternator regulator as one possibility.

The INJectors circuit feeds several circuits including the engine fuel Injectors. depends on which engine your referring too;
FE-E 2l engine J5-DE V6