The XM radio signal comes and goes...I've had the antenna changed twice. Any advice?

How do I refresh my XM signal?
The refresh signal will be sent from a satellite, so make sure your vehicle is outside and your antenna has a clear view of the sky. Turn your radio on and tune to Channel 184 for Sirius radios or Channel 1 for XM and SiriusXM radios. Simply tune to Channel 4 to verify your signal. http://siriusxmca.custhelp.com/app/answers/detail/a_id/252/~/resending-your-radio-signal

It could be a wire that become exposed in the back of the radio. If it works good when your engine off. It's doing it when you have the engine is runing because more things are running wich could cause a short out.

Its because of the tall buildings and all the power around you breaking the signals.

You best bet - if you can get to the rear of the XM tuner unit, is to temporarily connect a magnetic-mount XM antenna and see if it works. A bad antenna usually says "check antenna" - not loading could be a good antenna with a bad location. I would try the little XM antenna by itself, then go from there. $20 is a lot cheaper than $500. Let me know how it works out.

xm will not hold signal but if I move the antenna wire around inside the vehicle it will suddenly come in clear as day

You begin by setting up your existing (((XM))) antenna the one that came in your home kit (not included in repeater package) in a location that gets good reception of the (((XM))) signal. This may be outside, or on a south facing window sill. This antenna gets plugged into the rear of the Delphi (((XM))) Radio Signal Repeater Transmitter. A power jack is right next to the antenna connection, and should be plugged in and to the wall with the included power supply. There is also a "PWR OUT" selector switch on the rear of the unit which allows you to control the strength of the signal transmitted from the unit.

Once the power and antenna are attached, both blue indicator lights will light up on the face of the unit. The blue antenna indicator will light up only to signify that the antenna is attached correctly. It does not let you know whether your antenna is in a location receiving a good (((XM))) signal or not. You will have to look at the signal strength indicator on your (((XM))) radio receiver do determine best location for the (((XM))) antenna.

Once you have this setup, place the Repeater Antenna close to your existing (((XM))) Radio and plug it into your antenna jack on the (((XM))) radio cradle. This connector is identical to your (((XM))) Home Antenna provided with all Boom boxes and (((XM))) home receivers and kits so compatibility is guaranteed. The Repeater Receiver Antenna does not require any separate power connections. Hope this helps!
SATELLITE RADIO WAREHOUSE

Call the XM service number, they will refresh your signals. If it was the head unit, the same problem would occur during AM/FM signal transmission

the only idea i have is contacting xm asking if they can resend the traffic signal to your unit.

if the xm and gps antennas are close together this will happen. u will have to move one to the front and the other to the back of the vehicle.

If your roadyxt came in a red box then you need to hook up the XM SureConnect to your vehicles antenna. The instructions that come with it are simple and straight forward. Your FM transmitter will not work unless you hook up the sureconnect