1988 (ish) 110 Relays by location

i am not sure how original any of my wiring is because my 110 has been converted from TD to 200 and now 300Tdi.
Does anyone else have the same relays?
Behind dash there is the black dim dip unit and a gold metal relay, any ideas on the gold relay?
Then behind the fuses there are three relays.
Two rusty metal relays, I know one is the starter but the other??
Then a blue plastic (see throughish) one that seems to be bigger than the others. Any idea?
Thanks

Thin blue one sounds like the flasher relay for the indicators. If you turn them on it should click intermittently.