JBL issue 4th gen

[bootheel]

Hey folks. Just recently bought an 05 Limited with JBL Synthesis system with RDS. Rig is bone stock as best I can tell with no modifications. The problem I'm having is that the HU periodically is acting like it is off frequency. It is most noticeable when it has been raining or is really humid. I'm able to hear the station but it is sounds like it is not totally locked. Nothing I have found will correct it other than letting it play for awhile until it straightens up. Also this always happens the first time you start the truck for the day. Once it straightens up it won't do it again that particular day. Also this problem affects fm and cd so that makes me think it's not a reception issue. Haven't found another thread talking about this so apologies if there is one on the forum. Any ideas? Thanks

 

[Okie81]

Might be worth pulling the headunit out and making sure both antenna inputs are plugged in...if it's a reception issue that is.

 

[JeratBP]

If it's not the connections and you need/want the radio fixed, check out United Radio Service in Syracuse, NY. They repair OEM car radios, including our JBL/RDS Panasonic units.