A Guide to relays?

[The Bishop]

Following my earlier request and having sourced a 99 and 292 relay, I wonder what those other blank areas of the relay board are for?

Do they have wires attached to them (as apparently position 7 has) and what do they do?

Am I missing other cheap and easy mods/improvements? Does one of them flick a switch to return 50mpg?

Is there a table of :

Position 1 - does "x" - requires relay a
Position 2 - does "y" - requires replay b
etc?

Thanks

[1664]

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