AM/FM radio and wire identification

AAndrews said
I'm pretty sure here's how they are wired. Green and black are speaker. Red is power, orange as stated is dial illumination and brightness. Funny thing though is that there is no brand id on the scale. Usually says Dodge, Plymouth or Chrysler.

View attachment 1715852357

Both green and black wires go to the speaker? Car only has one central dash speaker.
There is a tiny Pentastar under the "15" between 102 and 108 FM:)

Cuda Al said
Keep in mind that these early AM/FM radios were NOT stereo.

Alan

Yeah I figure sound wont be great, id just like to hear something while I cruise :)

billccm said
Bendix radio. I have the factory service manual for the early series. Repaired many over the years and have one being shipped to me now for repair.
These are AM radios that have kludge FM as a quick and dirty after thought. FM performance is far from good. I actually hate working on them as the FM PCB and tuner are a bear to take out and repair.
Not sure when the audio amplifier transistors changed from TO3 to TO220, but each are robust and reliable.

Do you have a model number? I was googling "Motorola PD2509" since that was on the label underneath.

Also, I noticed when the AM decided to work occasionally, there was interference with the engine speed. I know there's noise supressors built into the car, who knows after 50 years if theyr'e intact. Would my radio guy be able to install a noise surpressor into the internals of the radio itself? He's already going to add an aux cable wire I can route under the dash. Is internal noise surpression even a thing?