[b]IMHO you need a 2nd set of lights; I have purchased an additional amber set, and plan to mount them just above the existing amber side marker lights toward the front of the coach. You need to keep the original marker lights intact.
Keep in mind that these will light when you [b]brake as well.
Just before embarking on my 3 week road trip from San Diego via The Oregon Gathering to Saint Louis and back to San Diego, I installed my 2nd set of amber side markers just above
the existing side marker lights toward the front of my Fiber Stream
, and I wired these [b]extra lights into the turn signal/brake light
circuits. They worked well, as expected. I did not notice any improvement in other drivers behavior, however.