I've only had the "munks" hit the wiring in my vehicles once - 28 years ago. They COMPLETELY wiped out the wiring in my brand new 1990 Chrysler - $875 - insurance WOULD NOT cover the cost.
Now - they build nests - ferret away all form of seeds - and poop in places where the heater fan will blow it out of the ducting and right on me - - nice, really nice.
I check each vehicle - I've got two - once a week for, mainly, nests. Nests in the wrong spots will start a fire in the engine compartment.
I don't fool with guns - they see me and a rifle and they are history. Besides I have one that will stand up on the tailgate of the pickup - stick his tongue out at me and go - ya, ya, ya. He knows I can't shoot him there.
I use traps - fairly effective. Normal year I will catch 18 to 24 munks. Problem is - there are twice that many waiting in the wings to take the place of the trapped ones.
I used the spinning can covered with peanut butter in the five gallon plastic bucket filled with water last year. I think the final total was 24 munks and around 42 mice. Started about this time of year and ran it until freeze up. This spring I have not noticed even a slight change in either of the rodent populations - still just as many as ever.