I get FM reception but no AM on my '05 Jetta factory radio..help?

Do you have base or up;level system ?

Table 1: Radio Features
Table 2: Cassette Features
Table 3: Compact Disc Features
Table 4: XM Advisory Messages
The radio receives power from the RADIO fuse in the junction block-right I/P. Ground is provided via G201 and G202. The radio is enabled/disabled by class 2 messages from the body control module (BCM). The radio routes audio signals from the digital radio receiver or the vehicle communication interface module (VCIM) to the speakers and/or amplifier when directed by class 2 messages.
The Entertainment System on this vehicle is configured with an AM/FM stereo radio with the radio data system (RDS) and either a cassette player or a CD player or both. CD and cassette. The uplevel system provides the customer with extended range speakers and an audio amplifier. Satellite digital radio (U2K) is available with uplevel systems.
The following list shows the radios available for this vehicle:
• Radio (ULO) - AM/FM Stereo, Cassette with RDS
• Radio (UNO) - AM/FM Stereo, CD and RDS
• Radio (UPO) - AM/FM Stereo, Cassette with CD and RDS .The complexity of the radio systems on these vehicle is mind blowing .

Your best bet take it to a GM dealer , has features you are unawear of .
DTC B1025, B1035, B1045, or B1055
When the radio is powered up, the radio supplies low level audio signals to the speakers. If the vehicle is equipped with an audio amplifier, the amplifier will boost the signal sent to the speakers.
DTC B1025 Audio Output Circuit
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With the scan tool, monitor the DTC Information for DTC B1025.
Does the scan tool indicate that DTC B1025 is current?

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Nissan Maxima Car Stereo Removal and Repair - YouTube

? 8:52
https://www.youtube.com/watch?v=RT-SZEfeA4Q
Sep 16, 2012 - Uploaded by Factory Car Stereo Repair
Factory Car Stereo Repair .... I have nissan maximal 05..the CD part turns on but the cd won't eject...should ... I have a 2005maxima non-bose radio system. ... my speakers is super in my 05 maxima but my cd player keeps on ...

Nissan - Factory Car Stereo Repair

You will need to pull the radio out of the dash and make sure the antenna is still pluged into the unit. If the antenna is in the windshield make sure the glass is not broken, and the wire broken. If there is an external antenn, you need to check the connection at the bottom of the antenna, and the wire is good between the antenna and the radio. Has any new items been mounted recently, the screws could have damaged the coax.
Rian

the radio could be bad as well. if the tuner in the radio is bad it wont get reception either. go with a good aftermarket one not a cheapy there no good anyway.

you can try a AM/FM antenna booster if you know how to get to the back of the radio. Otherwise the radio ground needs to be checked out and the antenna ground would need to be tested to see if there was corrosion on the antenna base or the connector to the back of the radio. On some cars the antenna is located in bad area and they don't get the signal boost off of the cars ground plane The more reflective surface you have on the car the more radio waves will bounce back and increase signal strength. Also Depending on atmospheric conditions and skip conditions sun spots and other natural occurring things can cause poor reception. The signal booster is about $10.00 at any radio Shack or any auto parts store. Hope this helps.

I would think it's a fluke thing,radios just quit,it's their thing.A new radio shoud fix your problem.

replace the attenna if that does not work the radio is the problem

I am not sure about repairing the unit. Do you have a CD cleaner?
You might check with a reputable auto electronics shop, one that specializes in car audio. They may have an adapter that will allow an aftermarket radio to be controlled from the steering wheel. Rosen makes a nice am/fm/cd/dvd navigation unit that also has XM and iPod inputs. The hard part will be to find supporting interfaces and wiring harnesses to fit a 99.

remove the antenna and check that it is connected properly. the body work could have resulted in a poor connection.especially the ground connection to the roof itslef.

generally each speaker in any car as a wattage range from 25 to at least 60 so if your car as four speakers lets say you would need a radio that with the four speajer channels with 200 watts but 300 would be better because it will move the factory speakers better and it wont put a load on the new radio