Posting this in case someone else has a similar failure in the future.
We were watching TV via Dish Winegard Trav'ler dish on roof, and Wally receiver in coach. In middle of program complete signal loss, weather clear. Checked dish account, all was current.
I was completely unfamiliar with the trav'ler other than how to turn it on and off to deploy dish and stow dish, so it took 3 days of head scratching and thinking to find the solution. 1st hooked up tailgaiter remote ground level dish into back of receiver, and after fixing a cable end, that worked for good signal to TV. (neighbor had tools to do high quality cable connector replacement and did that for me, as my tools for this are a knife and sidecutters).
So fixing the winegard dish signal was next.
Neighbor in campground saw me trying to troubleshoot and offered up a tone generator for RG6 cable, and a sat signal tester that can tell if LNB is hitting a satellite.
Inside the coach (2003 U320) there were two cables from the rooftoop dish, one labeled sat was unused, and one labeled sat ant was the one actually in use in use.
Using neighbors tone generator, and with him inside coach and me on roof I removed the two cables at base of the rooftop dish that feed forward then down into the coach. Both cables had good tone/continuity. (signal generator inside coach on cable end, tone receiver on rooftop cable end).
Using a short cable section I used his other tester attached to base of dish, and the the two cable connection ports feeding the cables into coach had no LNB/sat reading. There was a 3rd port on the base of the dish capped off and unused, checked that one and it had good signal showing LNB was seeing the sattelites.
Hooked the cable labeled sat/ant to the 3rd previously unused port and had reception to Wally receiver and TV.
Where the 3 cable ports are on the base of the sat dish, there is a removable inspection/access port with four 8mm screws on it. I expected to find water in there from recent rains to explain signal failure.
Removed cover, dry inside, corrosion on the 2 failed ports, no (minimal?) corrosion on working port. I took photos posted below. I did not attempt to repair the 2 corroded ports as the 3rd port is doing what I need.
So, it looks like at the factory when Winegard was installed they used 2 cables to inside of coach, probably so 2 receivers could be used.
Photos:
Pic 1 shows the 2 cables and 3 ports at base of dish, and 2 of the 4 cap screws on access cover. (access cover gasket was intact and good).
Pics 2, 3, and 4 show inside where the corrosion is visible. Unsure of what is under the shrink wrap of the failed 2 ports, but my guess is degraded wire/connector.
Without my neighbors testing tools and help I would have probably had to hire a tech to troubleshoot and find the trouble spot. Great guy to offer his help.
Since this occurred on my 2003 it may occur on someone elses rig, and this post is to narrow down what to check first.
For searches: Sat signal loss , winegard , travler , traveler , winegard trav'ler , sk-1000 , wineguard , complete signal loss
I just ordered this coax tone generator so I can test cable continuity in the future. Can also identify which cable is which for the unlabeled ones.
Coaxial (Coax) Pocket Continuity Tester (Tracer) with Voltage Toner (Sound)... (https://www.amazon.com/gp/product/B074CQ8THY)