Four problems related to battery cable have been reported for the 2007 Jeep Wrangler. The most recently reported issues are listed below.
I opened the door to the Jeep and the wipers, horn and wiper fluid engaged non-stop without a key in the ignition. The only way to stop them was to disconnect the battery. When the battery cables are reconnected, the horn, wipers and wiper fluid sprayer are again engaged. On quick research, it was discovered that this is a known tipm failure issue that can also effect the airbag (preventing deployment as well as randomly engaging it while driving), fuel injection causing sudden loss of power and vehicle control as well as issues with lights and gauges. Issues were severe enough to issue a recall on 2007 year models but similar issues with the 2008 are not addressed. I was fortunate the the vehicle was parked in my garage when the tipm failed and not driving down the highway.
Driving down the road when suddenly the horn started honking,wipers started on their own as well as wiper fluid squirting , radio came on and lights turning on and off. Pulled over and even after the car was turned off and key removed ignition the car remained running with all electrical equipment running off and on. It seems that many other people have had this problem with their Jeep/ Chrysler vehicles. I replaced the battery cables and started the car again, it was fine for about 30 seconds then it all happened again until I removed the battery cables. I removed the battery cables to the car because I'm concerned that the electrical problem may cause a fire under the hood and possibly burn my house down.
While driving down a 7% grade hill, the brake pedal went to the floor, warning lights on the dash lit up and the engine raced. Followed by ineffective brake modulation, more lights, increased speed, and panic of wife (driver), children in car seats 2), and dogs (3). Wife was able to use emergency brake to slow far enough to shift automatic transmission to 2nd, followed by 1st, pull off to the side of the road and jam it into park. She drove to the bottom of the hill and into a parking area in 4wd low. The vehicle was towed to the dealer where they found nothing concrete to blame. They speculated that a corroded battery cable caused a voltage spike(s) which the computer interpreted as the vehicle being in a skid and the computer took away all driver control of braking. Luckily, they all survived.
Vehicle was set on cruise at 45mph and suddenly suffered a complete power loss and stalled. No equipment was functional in the vehicle, including gauges, headlights, radio, etc. As the automatic transmission was still in drive, the vehicle decelerated very suddenly until power was restored approximately 3-4 seconds later, at which point the vehicle restarted itself. Power steering and power brakes were also affected during this power loss, and neither was functional. Battery cables do not appear loose and there is no other indication of loose wiring.