Ah yes.. reminder.
One reason those START switches are break-before-make is .. turning off all the other toys. Love the guy's English - in many ways more accurate and expressive than lots of 'good' sentences.
Given wiring looms and paucity of space for *neat* relay installation, etc. - I think I have to pass on this project until I actually install the cute digital readout of oil or water temp, pressure and voltage + all the sensors. I built this and tested (from magazine kit of parts + board in a ~ 2x3 display) but putting a tee on a critical oil line, or into a large coolant hose (given the mass/size of the rather antiquated Detroit-style sensors) has deterred me from completing the project. This even though I'd really like to *see* what my oil px is, glance at the charging system, etc. On Acura, the alternator is weird and is run from its own CPU and 'management system'! No Pep Boys stuff, on the road. I was going to use it on the Saab.
{sigh} law of unintended consequences again.
Ashton, chicken.