Take the coax off and inspect the ends. I’ve seen center wire too long (shorting out) and too short ( bad/no connection). You can get a simple coax tester at your local big box hardware store.
Depending on what booster you have, I’ve seen a few of the type Keystone likes to use, fail at the TV2 connection.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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