can anyone tell me what these wires are for?

[smithyr5gt]

as above. its the brown and yellow ones and the red and blue. as marked.
two have to be for the oil pressure switch as that's not plugged in. but which two? and what are the other two for? sorry just noticed the black one as well?

[Haz]

It's been a while but think the red and blue are for the turbo heat shield and carb temp sensors to turn the perc fan on.
Oil pressure and level are both orange and brown wires.
Black is the loom earth, should have a fat and thin joined together.
Yellow is for the alt to turn it on, should be a 2 pin connector with a purple in also.

[smithyr5gt]

ok thanks. dont have the perc fan. so ill just tidy them up.
ill have to have a closer look at the others as my car runs fine and the yellow for the alt is in place.
i know the oil pressure switch isnt wired up as thats whats leaking. so i took it out to see if i had a copper washer for it. the wires were never fitted to it.


thanks for you help.