Hey Bloke, I havent rigged one up a jimny yet, But I have done patrols, toyotas ect, ect. They are pretty easy, The hardest part is soldering the connection end on the the uhf lead for your arial. I normally get a shop to do that bit.
I prefer to have a separate switch that controls the Uhf so you can have the car off, keys out and still run the uhf (Army trick)..
I run a duel battery system so i can do that real easy dosnt matter if I forget to turn it off. If you put that switch next to your ignition its easy to remember. Other than that just run an in line 5 amp fuse and insulate everything, Arial cable and power leads. The more insulation you have on the Arial the better signal you get due to less electronic interference. I like to use the non split sock style condute then put the split ribbed stuff over it (also army trick). Give yourself a good day at least. I take a lot of time to run my gear and I only ever do it once. Buy the good stuff it pays in the end
Good luck, make sure you have a beer wile doing this stuff it reduces stress levels lol
