Thanks all of you for your helpful responses, much appreciated.
I'm wondering if the culprit is in fact the brake pressure sensor.
I believe D97A is up behind the dash, on the right - not in the engine bay. I think it's labelled on the top of itself "3+3+3" and this is D97 A/B/C in essence. My experience has been that save for physical damage these interconnects are hard to affect.
Hi Addo, I've been wondering that too, if it is how do you reset it or get to it?
If the D97A (with B and C) connector is inside the cab it's unlikely to have been snapped, banged or decoupled by my clumsy thrashing around with the gearbox on the other side of the firewall so I'm happy to rule it out at the moment.
Alexie I tend to agree, I didn't disturb anything in the cab at all and the clutch switch shows no fault in mECUscan.
Hugh , thanks for clearing that up but no driving or even using of the pedals took place between it working and not working only a change of the clutch with all that entails electrically, removal of battery, tray and junction box, disconnection of reversing light switch, gearchange cables and slave cylinder, maf and vacuum tubes with the airbox and gearbox battery earth.
Proinsias, yes they are and I think you would be right but the fault occurs without touching either pedal or if you do it makes no difference, and they were working fine till the gearbox came out so I'm tending towards the "not actually the pedal switches theory for the time being
I think the switch thing is either a spurious result caused by a fault in the signal route wiring that I have damaged whilst manhandling the gearbox by myself laid under the car into or out of the clutch/flywheel or it's a different switch like a pressure switch (even though I can't find mention of one in eLearn) As Addo suggests.
( I've made a really long lead for my multitest gauge so I can check the continuity between Pin 16 on the blue connector at the fusebox and Pin 32 on the ABS control connector which is the crucial wiring section, before that point I think it would affect the brake lights as well and at the moment they work perfectly)
if anyone knows something about the/a brake pressure sensor/switch ie, function, location etc please let me know.