New knock harness how to avoid mice?

I had some wiring issues with my truck, And ultimately had to bring it to the dealer out of town. Then a week later I started having other issues, I pulled off my upper intake and there was a mouse nest on knock sensor 3 and they had chewed almost completely through the wires right at the plug. I'm on my way to get a new harness now, and I'm generally curious if there's anything I can do to keep mice out from this one? I do plan on putting traps outside my vehicle, but is there anything I can run like extra tubing or something over it all, I don't know I just know I don't want to do this again.. should I. Spray some rodent repellent under my hood or something? Lol idk what a good option is

 

Maybe something like this??

https://www.bitter-rat.com/

 

Have you used this before? I'll check it out more thoroughly and probly will order a can

 

I read peppermint is a deterrent.

 

This is what I use. Havent seen a single trace of mice or their pee or their nuts. I do apply every night. Heres the post with product:

https://www.tundras.com/threads/act-of-rodents-electrical-damage.127119/page-2#post-3262619

If you feel like scrolling through the whole thread, ignore all that BS about house cats. They're lazy and overfed in America. No respectable american can will chase dinner.

 

We have 11 feral cats that live in our backyard. We don't have mice, snakes, squirrels, or bird problems.

 

Just a cat problem. Maybe a couple dogs to get rid of them cats?

 

Then what…?

 

No and then!

 

My 2 dogs don't really give a crap about those cats. The young one chases them but we have a training collar on her so if we catch her doing it........ZZZZzZZZZzZZzap

 

I’ve got a few of these rodent pouches under hood, every couple or weeks I put a little of the peppermint oil on them to sort of reactivate them. Truck stays outside and I live in the woods. Did the screen over cowl openings too. So far no mice or squirrels in truck. Have caught several in garage and a few in house in traps. Dogs do a good job in backyard. Foxes and owls help out a little at night.

 

I use fresh cab rodent repellent in our camper and unfortunately it sits most of the summer never had a single sign of rodents in 3 years also have used peppermint around the wheels and chasis

 

Peppermint oil is great. I throw it in a spray bottle and dilute it a little, then spray under my wheel wells and engine bay regularly. Never permeates into the cab that i've noticed.

 

And if it does, it smells a lot better than a dead rodent.