Lifetime Premium Member
Date registered: Oct 2002
Vehicle: 1967 250 SL, 1963 220Sb
Location: Los Angeles / Altadena
Mentioned: 3 Post(s)
Quoted: 121 Post(s)
Yes, the din plug with the slide on connector goes to the amp. The white and black plastic plugs with two terminals go in the speaker outputs from the amp. As for that grey cable with the strange end on it, I can't tell well from the picture. I think you are thinking it is the power antenna power line, but it really looks more like a mangled antenna cable (not the power, but the frequency). Do you have the old radio? Look in it to see if there is part of an antenna cable stuck inside the old radio. No, looking at one of your earlier pictures I see it is a white wire with some sort of covering on it. Unusual. If that's the case (a single wire with a connector) it's to actuate the power antenna. The antenna gets +12V constant and switched +12V from when you turn the radio on. I think you have it sorted now, as long as you have a power wire for the radio... (which is usually a black wire coming out of the back corner of the radio, sometimes with a bullet shaped terminal on the end, sometimes with an in-line fuse, sometimes just bare. That gets connected to either switched +12V or constant +12V depending on whether or not you want the radio to always work or only when the key is turned.
Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...