Ok people bit of help required here please as my electrical knowledge is limited

Car - 1986 3dr sierra cosworth

Currently going through wiring loom before it gets put into car after restoration and have come across this

First picture is of a relay causing my headaches at the moment, I have no idea what its meant to control as searching on the internet just brings up all sorts, 2 of the wires out of it seem to be melted together so at some point theres been a major electrical fault, can anyone point me in right direction as to what these wires are controlling at all

Picture 1 - the relay in question





Picture 2 - the 5 wires going to this relay




Picture 3 - damage to the yellow and brown wires along full length between relay and connections




Picture 4 - this is other end of yellow wire going into the connection




Picture 5 - full picture of the yellow wires connection




Picture 6 - where the yellow wire ends after being followed past the connection, the length of wire after the connection appears undamaged (ignition?)




Picture 7 - this is where the damaged brown wire leads to, also first of the undamaged brown/black wires ends up here




Picture 8 - 2nd undamaged brown/black wire from relay ends up here




Picture 9 - the 3rd undamaged brown/black wire finishes here (abs?) This uses the same pin from the relay block as picture 8 and can be seen exiting the relay block on the right hand side of picture 2




Does anyone have any ideas on what these wires actually are and what could of caused the short, also where can I get hold of replacement connections

Any help appreciated thanks

 

Have you followed the wire to the ecu plug connection and found out which one it is IAW the diagram???