Chipmonk & Squirrel Damage Prevention Light?

Only thing I have not tried was leaving the light on in the shed and puting a light under the hood of the truck. Has anyone made this work?

I'm in Tucson and have fought the packrat battle for many years. Like you, I tried everything I could think of, including all those you mentioned in your post. I've had damage on several vehicles and had to rewire my old 67 F-100 twice. The only thing that has worked for us is light. We surround the rig and cars with LED rope lights which illuminate every night on a timer. I used to raise the hoods on the cars and hang a trouble light every night. Matter of fact, when we first moved into this neighborhood I thought everyone must be always working on their cars as so many hoods were up! As a backup, I am also using the little sonic devices that are supposed to repel rodents. I have a couple on the exterior and a couple inside.

Last month I did not have my lights going for a couple of nights. During that time, the little bas***s climbed up on my valve cover (it's a DP) and left their droppings, ran the length of the 40' rig through the cable tunnel and started to set up shop on top of my fuel tank way up front. Man, I went into a full frontal attack. Light it up like Times Square and sound the sonics. They haven't been back.

Good luck.