As mentioned test/check the switches they can just be looped out. Just because you replaced them a few years ago doesn't mean they not suffering water ingress. If the switches weren't new, it's highly likely they were already suffering just not enough to cause a short, even if they weren't after a couple years water can and will get in. The relay suffers the same and from overzealous jet and hose pipe washing, I've known these to fail because of the washing within a few months.
As also mentioned the kill switch could also be the issue, but the fact it's starting after repeated attempts, suggest the relay, as the contacts are jammed and repeated attempts is freeing them. The relay can be taken apart but be careful it it's corroded replace it, it will just get worse.
As also mentioned the kill switch could also be the issue, but the fact it's starting after repeated attempts, suggest the relay, as the contacts are jammed and repeated attempts is freeing them. The relay can be taken apart but be careful it it's corroded replace it, it will just get worse.
Later