The dash lights, speedometer, and wipers on my 2008 grand caravan will flash on/light once in awhile. there is no loss of engine power. did have some problems with the radio turning on and off. problem seems to be worse when it is very hot or humid. Spent a great amount at the dealership but were not able to pinpoint problem. i saw a blog of other users with the same problem...but no definitive answer. some suggested battery ground issue or a 20a fuse. suggestions?

 

Can't speak to specifics because I've zero hands on experience with it but form reading multiple forum posts for years the Totally Integrated Power Module (TIPM), your fuse box, is slowly becoming THE problem child for the electrical system on Chrysler's 5th generation vans. Your symptoms sound typical. It is far from what people think of as a fuse box. It contains microprocessors and multiple circuit boards that control *******ly all of your power accessories. About all you can do is give it and it's connectors a shake test to remedy or induce the problem. You can disconnect it's connections and inspect the contacts for any signs of damage or corrosion. Some have gone as far as disassembling it looking for any signs of the same. Other than that you may have a CAN data bus problem effecting all your symptoms. The TIPM plays it's part in the bus too.

What's the *******? It is... v i r t u a l l y. Why is it blocked? Hmm.