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Muting The Radio With Hands Free Phone


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:driving: Have just bought a 1993 LS400 and fitted a car phone kit (Nokia CARK91).

The kit has a wire that is 12volts normally and drops to 0volts when the phone is in use.

I know I could buy a relay to switch the speakers, but does anybody know if there is a connection on the radio for muting it.

I have a wiring diagram for the audio system, but the wires are just labelled with codes and I do not have the key to work out what they are.

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