No tv channels with a windgard RS1500 on RV

[pchrcane65]

I purchased a new travel trail and has a wingard rs1500 on it when we took it from dealer TV worked at the dealer but we we got it home it did not work and we r 100 miles from where we bought it I had check all connections and found a cut in the coax just below atenna so i cut and put new connector on thinking that was problem but still no channels I have 12v dc up to atenna and red light is on does this tell me I have a defective atenna?