Darryl&Rita wrote:
The NiChrome didn't get hot and melt from a resistance issue, it melted from a current issue. Have the battery terminals ever been removed while the RV was plugged in? Quick short to ground would do it.
I believe you got that right on. I did get one small spark in the days prior when i was moving things around venting my boxes. No blown fuses and everything seemed to work so i thought i was in the clear.
After looking at the photo of unit with labels someone linked me to i found that the part i was referring to pervious the nichrome wire was the SCR. I soldered the wire back to the tab on the ballast and it seems to be working so far. Im monitoring it closely however as i am unsure if the wire will get hot enough to melt the solder.
Thank you to everyone who gave constructive responses.