2 black wires are ground but there are 4 other for the 4 speakers and I don't know which is which. Radio has a sticker on it that says its for 1979 vehicles. Orange= Pink/Blue= White= Pink/Green=
I should probably clarify, not power ground but speaker ground. There are two black wires that share a pin and 4 others. It would only make sense for the 2 black wires to be the - for all 4 speakers and the other 4 to be the positive wires. I can check front to back with the radio but have no idea how to figure out left and right.
Close to what you have: Ford vintage AM/FM radios (late 60's to mid 70's or so) B+ ....................Yellow GND .................Chassis Inst Light .........Light Blue/Red stripe Ant B+ .............Orange Speakers Front Left .........Pink/Green stripe Front Right .......Pink/Blue stripe Rear Left ..........Orange/Green stripe Rear Right ........White/Green stripe {Black wire connects to all speaker (-) sides}
The radio doesn't have a left/right balance control? Looks to me like your radio isn't setup for a four speaker system. Some old FM stereos had a separate front/rear fader control separate from the radio as an option.
Make sure they are not low impedance speakers or the amplifier will be damaged. Better is to go buy a fader control at Radio Shack.
I could be mistaken and it might be left to right fade but no front to back. I don't really have a reference point.
The odd thing is its 6 wires, 5 unique ones. Two channels would normally be 4 wires and 4 channels would be 8 wires.
bmcdaniel, where did you find that info? All I have found is this which I also found on a second site: "Okay, to start off, the two-wire pigtail is for radio illumination (same as all dash illumination), so its harness side is hopefully hidden somewhere and not used. The other wire is the power feed. The radio's ground is chassis-connected. You see the nut and stud in the second picture? Connect that to body ground. Now, luckily, Ford has standardized wire colors, and with the correct colors, are actually as follows: --Black/white (hash), speaker return --Pink/lt. green (stripe), left rear speaker --Orange/lt. green (hash), left front --White/lt. green (hash), right front --Pink/lt. blue (stripe), right rear So all speakers' return wires go together before connecting to the black/white (hash), unlike aftermarket units that have separate returns for each speaker. You can run either two or four speakers, however you want to set it up."
Back in the bad old days before digital audio amps, on car analog amps all speaker grounds were common. They may have been isolated and different colors if they went through a fader but they were all basically just connected to chassis ground.
For anyone wondering in the future this was exactly correct. I now have 4 working speakers with fade/balance.
