Chasing down some wiring untidiness, driver's side under the bonnet. Sorting the CPS wiring once and for all, and a few other small issues. Got it all back together, test drive time.. Good thing I live in a quiet street. Seems I knocked the vacuum hose off the pump on the alternator without noticing. I've experienced no vac brakes before, but this was truly scary.
Never thought much about clamping vac lines before. That changed today.