[Wire]How to solve no sound from rear speaker issue on Pumpkin Audi headunit?

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[Wire]How to solve no sound from rear speaker issue on Pumpkin Audi headunit?

Postby Andy » Mon Mar 14, 2016 8:31 am

If you are happen to have Pumpkin Audi headunit, such as C1220 for Audi A4 and there is no sound output from the car rear speakers, you may check the topic to solve it.
S1, please check at your original Audi car connector, you may found out that there is no rear loudspeaker wire on the plug, but only 2 pair loudspeaker wires there. That is because your original car rear loudspeakers are controlled by a factory built in amplifier in the car.
OEM-plug.jpg (152.04 KiB) Viewed 9004 times

So first you need to do is to check if you have connected those RCA wires correctly as it is the audio output from the Pumpkin headunit to the original car amplifier. They are two method, please try another others if the one you use do not work or output lower volume.
RCAconnection.jpg (181.25 KiB) Viewed 9004 times
If there is still no sound,you can try to leave the C and D disconnected ,just connect A and B to 5 and 7 or 8 and 6.
S2,If all connected correct but there is still no sound comes out from the rear speakers, please check if you have set the Amplifier field wrong in the setting.
sound.png (270.86 KiB) Viewed 9004 times

S3,if the rear speakers just lower than the front speakers,you can adjust the output volume rotary knob in the "amplifier box" to the prefect level .
QQ截图20171227170414.png (334.38 KiB) Viewed 6352 times
QQ截图20171227171830.png (1.17 MiB) Viewed 6353 times

S4,If those are correctly setted, but still not luck with the sound, then you may need to use the following small parts to solve it. It is called LOC(line out converter), you can buy from your local or internet, normally cost no more than 10USD.
loc.jpg (103.49 KiB) Viewed 9004 times

And you need to manualy joing the wires to the REAR speakers wire from the Pumpkin headunit's harness. And the RCA side connect with connector A and B from the previous image shows.
Rear-loudspeaker.jpg (133.57 KiB) Viewed 9004 times

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