Hugh, the switch should really be placed in the feed from the ignition which is the low current side of the relayHugh wrote: ↑Mon May 11, 2020 10:48 pm Greetings Gary,
Might this sketch assist you?
Light relay circuit ABR.jpg
The following link to another website might help explain the principles behind 'relays'.
https://www.12voltplanet.co.uk/relay-guide.html
TTFN
Hugh.
It will work either way, but normal practice is on the low current side allowing lower current rated switches to be used, not much of a problem if the load is low amperage but if the relay was switching something meaty it would mean having to use a correspondingly meaty manual switch