Car audio help!

dsrckiyisvddht

It turns out after installing my bluetooth car kit I have to manually mute the head unit every time I get a call because my radio doesn't seem to have a mute thing at the rear on the ISO. What can i do so that it mutes? Any ideas? I don't want to get another head unit. Thanks

crosstownk

It looks like the radio mute is pin 11 on a Delta 6 or in block A on a Gamma.

See the link - scroll to the bottom for the VW Delta/Gamma head units. The link is in German, but you'll get the idea

http://www.selfmadehifi.de/hifi/kfz-prod.htm

louie

If you have a test lamp (5 euro in the motor-factors) you can easily detect the mute wire and connect it to the yellow one from the phone kit.

daedalus2097

How will a test lamp show you the mute input into a stereo? Surely you'd need something to mute the stereo externally to see the signal, and the OP says he has to mute the stereo so I don't think that's the case...

louie

Is very simple.
A test lamp has bulb inside which is like a conductor.
If you earth the clip to the body of the car and pin the power wire, the bulb lights-up, but if you pin the mute wire the radio receives a very low earth signal and will mute the sound.
Give it a try - it worked for me for the last 8 years and never failed.

daedalus2097

Ah, sorry - different train of thought... I'm an instrumentation engineer myself but I didn't think of that

louie

Sometimes the simplest way is the best way.