AM Radio Problem

[DLJSBIRD]

The FM component of my 2004's radio works flawlessly, but AM reception is generally very poor. At the higher frequencies it is broken up with what in the old vacuum-tube days we called "ignition noise." Back then the interference varied in frequency and intensity with engine speed and could be minimized by installing various suppressing devices in the ignition system. In my situation the noise is a consistent popping which occurs whether or not the engine is running. Any thoughts?

[steelblue5505]

Re: AM Radio Problem

Is your windshield the original? Could possibly be the antenna lead may be loose. Have heard that this will cause AM problems but not affect FM.

This is hearsay I do not know this for a fact.

[Kokomo]

Re: AM Radio Problem

Also, open the hood and be sure that the insulating liner (on the underside of the hood) has the grounding straps firmly attached. This will affect radio perfomance, too.

[ChromeDome]

Re: AM Radio Problem

A GPS can play havoc with AM reception if it is near the antenna.

[jayred1]

Re: AM Radio Problem

Another possible cause (from what I've read, no experience with it) is the installation of an aftermarket rear-view mirror with some added electronics (dimming, compass, etc.). Supposedly affects the antenna because of it's close proximity.

[FEsTbird]

Re: AM Radio Problem

I think this is a basic design flaw of both the window antenna and the multiplexing system of the various controls back and forth to the rear control module. I found that making sure the leads from the foil hood liner could make some difference, the stations above about 1050 AM are sometimes weak and have a lot of static. Since my favorite AM stations (sports) are in the lower frequencies, I have not gone to the trouble of working on the radio ground inside the car.