Winter Rats

Is there something I can do to keep rats/squirrels from nesting in the engine compartment…and eating the wires…during the winter?

If you live in areas where a lot of salt is used, don’t be surprised if it’s not rats, but RACCOONS that are eating your wires. I have a friend who has a cabin near the bush. His wires were virtually stripped off in a couple of days. I’ve never heard of rats going after salt and rubber.