As a VCA national officer for 5 years, and a VCA regional prez since before Day-1, I have 'helped' more-than-25 folks with warranty disputes. I have NEVER had even an anecdote of denied or even questioned warranty because of a Harness system. Dodge has always been FAIR in the end, in my opinion.
I have had TWO encounters where the install of a Roll Bar was used by the D-C zone rep as the "probable cause" to deny the claim. One lost, one disposition unknown.
Bottom line: If you are participating in high-performance driving schools, you are --USUALLY-- covered. If you are drag racing at a drag strip, you are usually Not. Why? TIMED EVENT! SPEED CONTEST! You wanna play, you gotta pay......
I am sure Gary L, Steve F, and Tony E could elaborate if they chose to........ JOIN VCA ! 1-800-998-1110