This is a 1960's or '70's Polara Model 9300 radio with cassette and graphics equalizer which I'm going to put in my 1969 Chevy C10. The radio part plug has NO orange or yellow wires (FYI I know what they're for). However the radio plug has: white, blue, brown, green, red, gray, ( I know what they're for) and TWO BLACK WIRES! I know one is ground (it measures 0 continuity to ground), but what is the other black wire for? It measures 1.5 k ohms to ground.
Last edited by Tonerman; 05/06/20239:32 PM. Reason: added photos
~Charley 1954 Chevy 3100 with 235 “Bud” Follow along in the DITY 1963 Chevy half ton stepside short box 230 1954 GMC 3 ton 302 And several more Chevy camper and work trucks 1979 1987 1996
If I remember correctly one black is for chassis ground and the other is a common ground for all of the speakers. the remaining wires are power and the 4 positive wires for the speakers.
