it always turns off when it rains
Use dielectric grease to waterproof the plug wire ends. Seal up the boots at the distributor and the plugs. Check the distributor cap to make sure the O-ring if any is in good shape and put some of the grease on it too.
Search Dodge Durango Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Dodge Durango Experts