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Old 20th August 2019, 13:46   #1
victorgte
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Default Symphony unit unusual fault

Decided to fit my old Symphony unit to my wife’s MK2 75. Plug and play as I thought, checked it worked and put it all in the dash.
However, as soon as I put it into D for drive, the unit keeps cutting out and showing “PHONE MUTE”
Then it simply flicks back and forth to either normal radio or phone mute.
Faulty unit or a wiring problem? I’m a bit stumped.
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Old 20th August 2019, 14:30   #2
Duotone
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Quote:
Originally Posted by victorgte View Post
Decided to fit my old Symphony unit to my wife’s MK2 75. Plug and play as I thought, checked it worked and put it all in the dash.
However, as soon as I put it into D for drive, the unit keeps cutting out and showing “PHONE MUTE”
Then it simply flicks back and forth to either normal radio or phone mute.
Faulty unit or a wiring problem? I’m a bit stumped.

Check to see if any wires are connected to pin 1 on the large grey ISO plug

This is the same plug that the steering wheel control wires are connected.

Pin 1 is telephone mute, cut any wires connected to pin 1.



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Old 20th August 2019, 17:54   #3
victorgte
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Thank you. It’s still light so I may try it now. Could be that simple.
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Old 20th August 2019, 18:16   #4
victorgte
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Done and working. Many thanks indeed. Always liked the Symphony unit in my first 75 and glad I kept it along with the walnut facia to add some class!
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