The JK's power sway bar unit evokes some very strong emotions--either the owners (like me) who make a big show of NOT getting out of their vehicle and getting dirty to disconnect, OR by the NON-Rubicon/JK owners who giggle with glee when we talk about flashing dash lights, obscure electrical problems, or engine fires relating to the power sway bar.
How our Jeeps are used is often considered more extreme than the average user, because our Jeep are rentals, and they spend all day every day off-pavement. When we bought our '09's Jeeps (after two years of an "interesting" learning curve with our 07-08 JK's) the modifications we do includes:
1. Rock protection for sway bar in the form of either a reinforced "stupid" bar (which then becomes known as the "smart" bar), OR an aftermarket bumper including sway bar motor protection.
2. Waterproof boot to keep dust, mud, water, etc. out of the irritatingly sensitive sway bar wiring harness.
Description of "The Boot": When our 09's came in, I knew it was time to take a proactive step in keeping the connections clean, so I started looking around for type of material we could use to wrap the unit. After trying a couple of things that didn't work so well (we had tried lots of different things including dielectric grease, plumbing tape, 3M seal, ziplock bags, etc.), Joey suggested motorcycle inner tubes. So I acquired some used ones from D&K Service in Cottonwood, for the mere cost of brownies.
We cut the motorcycle inner tubes in about 10-inch sections, then fold over one end and use Gorilla Glue to seal it up. Apply a little heavy-duty duct tape over the fold just for extra seal. Then we cut a 1-inch slit in the open end to allow for the rubber to better wrap around the wire coming out of the unit. Then use the heavy-duty duct tape to wrap and seal the whole end of the boot to the housing of the sway bar motor.
After a particularly wet and muddy week, we pulled a few off to inspect and they looked as clean and dry as the day they arrived. On our 07-08's, we usually had some sway bar malfunction within 5000 miles, and especially during mud season. After 6000 to 8000 dirty miles on our new Jeeps, we have had NO sway bar malfunction (not that was due to a wiring harness problem).
Picture of "The Barlow Boot":
Hope this helps someone else, too!