Turn Signal problems of the 2008 Jeep Patriot

We bought the Jeep used with about 50k miles on it. After a short time the check engine light came on for a valve to be replaced. Also, when we use the turn signal the dome lights come on. Of course even though we bought the warranty none of these problems are covered. I don't know how the lighting system failing could possible be wear or tear or misuse, but they say its not their fault and it's not covered. So in the 3 day period where we were waiting to have those problems fixed we had another problem. My wife and I were driving down the highway at about 50mph and the tire completely and instantly went flat almost causing us to wreck! with my 4 year old son in the back! we take the tire to a tire shop and they say it was the valve and it's a known problem with our vehicle for that year and explains everything about it. I call 2 other tire shops to verify what he said and they both automatically knew about the problem and said it happens all the time and I also need to have the others replaced costing over $350!!! we tell the Jeep dealership about it and they say we hit a rock driving down the road and they know of no such problems. I google the problem of tpms and sure enough tons of websites talking about everyone's ball joints going bad, and tpms problems. Not only are they acting like it's not a known problem when it clearly is. . . They put me and my families' lives at risk by acting like nothing is wrong and not letting us know that the problem will likely continue happening to the other tires!!!! this is an outrage and something needs to be done!.