Having trouble with AMC digital radio.

[ride172]

I have been working on this project for a week now and can't figure it out. My truck had a pioneer tape deck in it that worked great and suited my needs. It had an auxiliary input. I found an AMC radio from what I think is an XJ. I hooked it up and everything but FM works like it should. I can pick up stations but the stereo light doesn't come on. I also have to turn it all the way up to barely hear anything. AM works with normal volume as does the tape player. I have good connection at the antenna cable behind the radio but can't confirm beyond that. It does have a power antenna wire but everything I've read says leave it unconnected. Help me .... I want to go cruise it but need tunes.

[jimoshel]

If you're lucky, you just have dirty switch contacts on the AM,FM,Tape selector switch. Spray it with a shot of contact cleaner.If that doesn't do it then you're going to have to dig into the unit looking for a faulty part.

[ride172]

Thanks Jim ... I'll take a look.. The no stereo light coming on had the antenna on my mind Hope you are feeling well and enjoying this cooler weather.

[ride172]

Ok. I took it apart. Cleaned it up. It was already clean. Cleaned the button as best I could and the circuit board where it was attached. Hooked it back up and it is the same. Am and cassette work excellent but FM is barely audible and doesn't pick up in stereo. The seek button still picks up and stops on stations but even close stations won't light up the ST indicator on the display.

It has leds inside and has Mitsubishi logos stamped on the boards. How long have leds been around?

I talked to a man who claimed he had the same problem on an old Pontiac. He couldn't completely remember but thought it was something with a ground and the antenna. Does that rattle anything loose in anyone's head? I tried a rigged antenna directly to the unit and had same results as before.

[Eagle]

Ok. I took it apart. Cleaned it up. It was already clean. Cleaned the button as best I could and the circuit board where it was attached. Hooked it back up and it is the same. Am and cassette work excellent but FM is barely audible and doesn't pick up in stereo. The seek button still picks up and stops on stations but even close stations won't light up the ST indicator on the display.

It has leds inside and has Mitsubishi logos stamped on the boards. How long have leds been around?

I talked to a man who claimed he had the same problem on an old Pontiac. He couldn't completely remember but thought it was something with a ground and the antenna. Does that rattle anything loose in anyone's head? I tried a rigged antenna directly to the unit and had same results as before.

There should be an adjustment screw somewhere on the radio body to tune the receiver to the antenna -- but my fuzzy recollection is that affects AM more than FM.