That's a good question. You will want to replace the relay for the wipers. If that doesn't do the trick, there is a possibility the previous owner messed something up with the wiring with their DVD install, all depends on what they tied into to do it. The Hayne's manuals are good for having detailed wiring diagrams that will help you trace the factory wiring and you should be able to tell if something may have been cut that shouldn't have. Good luck!
- Cajun
- Cajun