1970 am radio qustion

[rockyrivermark]

I have a original am radio that is not working.
I bought the truck last week and there isn't a wire harness in truck for it.
I wired it on the bench to test but wouldn't power up. at least no power to the light with a tester on it.
temp wired a speaker and got nothing but i'm reading that those old am radios take a special speaker.
question is:
1. I found a picture of the wire harness online (pic attached). Back of radio shows 12v, ground, and speaker. only one terminal for speaker. does the speaker ground to body and only use one wire?
2. In the pic of the harness, which again I don't have. yellow is 12v., black is ground for radio, green speaker positive?
thanks for any input or advise on what I can test.
thanks, Mark.

[rockyrivermark]

[Custom/20]

Originally Posted by rockyrivermark

The radio bolts to the speaker housing which bolts to the firewall and the radio utilizes that as the ground. The radio does not have a ground wire because the radio housing is the ground its self. The radio wire harness(single red wire) was designed to plug into the speaker harness which then that plugs into the back of the radio.

Hope that helps.

[Gromit]

I believe those AM Radio power and signal repro harnesses are available from American Autowire; though the same thing slightly cheaper from the big specialist truck part houses like say The Truck Shop in the city of Orange, California, or Brothers Trucks etc.

[hdff]

If you bench test and it doesn't work check out a conversion to fm at www.garytayman.com. I'm in Indiana visiting my wife's family but when I get home this weekend I will be sending mine to him. Called and chatted to him last week I just need to pack it and send it. His service keeps em lookin old but plAying fm like a new one