HarryD

I Have a Blaupunkt AM/FM/Cassette unit. Its says it is a model CR-4073. It was made in Japan for SAAR in Brussels.

There are four wires in a single square connector in the rear. I am guessing one is for 12v power, one is the common for the speakers and the other two are for the left and right speakers. There is a separate antenna connector and ground lug as well.

The wire colors are black, white, green and red.

Anyone have a clue as to which is which?

HarryD

Well, I got lucky. I was rumaging through some old papers I got with the car and found a package of papers for radios. Most of them were for a Blaupunkt Frankfurt but one two sided sheet was for my AM-FM Cassette unit. How is it wired?

Red - 12+v
Black - Common for speakers
White (or grey) - Right Speaker
Yellow -Left Speaker

I hooked up my battery charger as a power supply, hooked up my speakers and voila! sound!