This is for the factory Volvo stereo with the EQ-2111 graphic equalizer (as my 1984 760 has). This mod retains all of the factory functionality, and let's the volume, balance, and fader controls on the factory head unit adjust sound from your iPod or other device. The sound quality is excellent!
Parts needed:
-1/8" stereo normally closed panel jack (radio shack p/n 274-246)
Wiring pinout in the 5-din connector of the EQ-2111 equalizer:
red: right + to amplifier (sound out from EQ)
white: left + to amplifier (sound out from EQ)
black: common audio ground
yellow: left + input (sound out from head unit into EQ)
green: right + input (sound out from head unit into EQ)
Wiring for 6 pin 274-246 radio shack jack:
1: connect to audio ground (black wire from 5 din)
2: connect to cut yellow wire on equalizer board
3: to input yellow wire from the 5-din connector (sound from stereo right)
4: to input green wire from the 5-din connector (sound from stereo left)
5: connect to cut green wire on equalizer board
Pinout for 6 pin 274-246 radio shack jack:
You just need to "intercept" the yellow/green wires inside the equalizer with the panel jack so that when the headphone jack is disconnected it passes through as normal, and when you plug in your device input is taken from it instead. You do this by cutting the yellow and green wires inside the unit and wiring each end of the cut portion to the audio input jack.
The panel jack itself can be mounted on the plastic faceplate of the equalizer in the upper right corner just where there is no metal backing plate (middle of the Volvo logo).
Pics:
I suspect that this mod will also work on other models of Volvo equalizer, although the wiring might be slightly different. I think you could also wire up RCA inputs and outputs if you wanted to use this equalizer/aux input between an aftermarket head unit and aftermarket amplifier, although you'd be limited to 2 channels.
Parts needed:
-1/8" stereo normally closed panel jack (radio shack p/n 274-246)
Wiring pinout in the 5-din connector of the EQ-2111 equalizer:
red: right + to amplifier (sound out from EQ)
white: left + to amplifier (sound out from EQ)
black: common audio ground
yellow: left + input (sound out from head unit into EQ)
green: right + input (sound out from head unit into EQ)
Wiring for 6 pin 274-246 radio shack jack:
1: connect to audio ground (black wire from 5 din)
2: connect to cut yellow wire on equalizer board
3: to input yellow wire from the 5-din connector (sound from stereo right)
4: to input green wire from the 5-din connector (sound from stereo left)
5: connect to cut green wire on equalizer board
Pinout for 6 pin 274-246 radio shack jack:
You just need to "intercept" the yellow/green wires inside the equalizer with the panel jack so that when the headphone jack is disconnected it passes through as normal, and when you plug in your device input is taken from it instead. You do this by cutting the yellow and green wires inside the unit and wiring each end of the cut portion to the audio input jack.
The panel jack itself can be mounted on the plastic faceplate of the equalizer in the upper right corner just where there is no metal backing plate (middle of the Volvo logo).
Pics:
I suspect that this mod will also work on other models of Volvo equalizer, although the wiring might be slightly different. I think you could also wire up RCA inputs and outputs if you wanted to use this equalizer/aux input between an aftermarket head unit and aftermarket amplifier, although you'd be limited to 2 channels.
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