Will be a pia to set up but can be done. As the Wranglers don't have an electronic transfer, you are going to have to wire up a switch to a custom made bracket that activates when you pull the transfer lever into 4wd. Think of something similar to how a brake light switch works when you push down on the brake pedal. If I had to do it, I'd probably wire it the manufacturer recommends and wire the switch in to cut the earth on the relay when 4wd is not engaged
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