Check for RECALLS ON WIPERS. I know there are recall for wipers on some Thor coaches. Also submit a report to the National Highway Traffic Safety Administration as this is a definite Safety Concern !
The wipers on our 17 Challenger 37 TB would only run on S L O W, and then only you rotated the lever switch back and forth to find the Right spot! Thor authorized me to take it to a local Camping World even though our warranty was expired. The tech fixed them in about 20 mins. The wireing plug was plugged into the Motor BACKWARDS! He changed it like it was supposed to be and they've worked great since, also our front power shade has stopped LOOSING it's programing, which it did regularly. My theory on that is they were both on the same relay, or cricut and the backwards wipers, would send a glitch that made it loose programing.
Check for RECALLS !
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Max Shaver Jr.
2017 Thor Challenger 37 TB
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