Well I had a similar problem but not exactly the same as yours. I took my car into the dealership because my alarm was acting funny / I couldn't unlock my doors. They said that the seal around the tail light was broken and allowed water to drip down onto the alarm module which was then sitting in a pool of water and shorting out. However I have the Chrysler 7/70,000 warranty and they did not cover it. Thankfully the dealership quoted me as if they were going to cover it so they were left with the remaining balance from my $100 deductible. They really took a hit there since the module was around $700 and they also gave me a rental for 3 (or 4) days assuming it was going to be covered.