i say old chap steady on what what.basic works can be helped by a manual so often many folk are hinted at to buy one it has nothing to do with not being bothered and to be a new member and telling older members they shouldnt be here will not get you a lot of help from others a pic of the relay and also part numbers might help but it if only had one led indicator before maybe the last owner wasnt to worried so you can always change all 4 for led and see how they flash and then fit relay if needed,you will also be able to tell if the unit you are looking at is the relay by unplugging it and see if the indictors still work