The story continues. Not wanting to make this failure the reason to make my first visit to a Newmar dealer since purchasing the coach I continued the investigation. So far I have been able to fix everything since delivery. Wanted to keep the string alive. So I decided to disassemble the right LED Marker/Turn signal LED in order to figure out what failed.
The NA Marker/Turn signal LED is an eyebrow light above and around the fog light. It is a very distinctive light making the NA easy to spot at night. Below is the functioning left light in turn signal mode.
The silver trim is held in place with VHB double sided tape which comes off easily. Under and below the trim is a plastic diffuser held in place with three self tapping screws. Under the plastic diffuser is an typical white/orange LED strip held in place with adhesive on the back of the strip. Once I got the diffuser off everything made sense.
Newmar had pierced the LED strip in two places with self tapping screws. Based on the paint marks, they paint the coach then install the accent lights.
I removed the LED strip which had 3 leads: ground, +12v and "W". The strip contained alternating white and orange lights. White for marker lights and orange for turn signals. +12 lead ran the white lights.
These LED strips come in repeating segments which can be cut. So I simply cut out the segments at each end damaged by the screws and the LED light worked again when I hooked it up to power.
I ordered a new white/orange LED string on Amazon. I will see if it matches the old strip. If not, I will just glue the old strip back on and use it with a few less LED's than it originally had.
So here is what I think happened. Newmar put a screw(s) into the LED strip during manufacturing causing a short which over time heated up a resistor that ultimately failed months later shorting out the turn signal circuit. Once I cut the leads to the LED's turn signal worked fine, minus the LED eyebrow light which is one of three lights that blink up front on each side for turn signaling.