right have a prob aquired a 2nd hand turbo timer

its a B-11 starbo made by sanyo

need some wiring help if anyone can

its gout 4 wires

RED, GREEN, BLUE all thick and a thin BLACK

i sure all timers wires are the same red bein pistion 1 blue being 2 and green 3 black as the earth

but not sure whats what on my ingination switch

its on an F plate ERST

any one help???