The first thing I would check is to make sure the 12VDC control voltage is present on the RG cable that is feeding the Jack antenna. This DC voltage comes from the antenna panel that has the push button on it like in this photo.
The JACk Antenna may also use one of these in-line power injectors.
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS