Im going to instal an alpine HU into a boat and Im trying to put some sort of mute or volume control on the driver side (HU goes on passenger side).

The head unit has a audio interrupt in lead, which Im guessing is like a mute control? Im wondering what I would need to wire up a button to send the right signal to the head unit to mute it.

Thanks.

 

As with all things 12VDC, you need a switch that will either ground the interrupt wire or send it +12VDC.

My guess is ground. So I would wire a switch inline from your interrupt wire to a good ground. If that doesn't work, hook the wire up to a 12V source. (The ground is 1. Safer, 2. Easier to try, and 3. the most likely solution.)

 

ok, I'll give that a try.

Would a push button switch on first push mute it and then on the next push unmute?

 

You probably need a maintain switch. (Something that, when pushed, says pushed.)

Otherwise you could get fancy with a relay and stuff, but that would be more complex.

 

You should be able to get a push-on push-off switch at radio shack.


push-on push-off switch

 

From my SWI-X instruction book

So yeah... it's most likely a negative input. The S2000 switches power to a relay which grounds the audio interrupt lead.