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APS 4 wire to Handsfree kit

pouzada

New Member
Joined
Feb 3, 2009
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7
Location
Marinha Grande - Portugal
Car
S202 220 cdi '99
Hi,

Can anyone tell me which wire of the APS4 radio should I connect to the handsfree kit to mute during a call?

Regards

Pouzada
 
On the standard ISO connector it would be Orange.
You could test it by earthing it while the radio is on but please don't blame me if you blow a fuse.
 
The mute signal is (almost) always an open collector type input with a pull-up resistor. So you would see about +12V when the radio is not muted and about ground when muted.

I'll have a look at the wire colour to be sure, in a moment.

OK, the mute wire should be a pin 3 on the A-connector, a yellow wire with a black stripe.
 
Last edited:
The mute signal is (almost) always an open collector type input with a pull-up resistor. So you would see about +12V when the radio is not muted and about ground when muted.

I'll have a look at the wire colour to be sure, in a moment.

OK, the mute wire should be a pin 3 on the A-connector, a yellow wire with a black stripe.

Hi,

Thank you!

Pouzada
 

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