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From: stever@videovax.UUCP (Steven E. Rice)
Newsgroups: net.audio
Subject: Re: Wiring problem for car radio and tape deck
Message-ID: <1562@videovax.UUCP>
Date: Fri, 21-Feb-86 10:56:46 EST
Article-I.D.: videovax.1562
Posted: Fri Feb 21 10:56:46 1986
Date-Received: Sun, 23-Feb-86 13:01:37 EST
References: <65@oucs.UUCP>
Reply-To: stever@videovax.UUCP (Steven E. Rice)
Distribution: na
Organization: Tektronix, Comm Group, TV R&D
Lines: 24

In article <65@oucs.UUCP> tim@oucs.UUCP (Tim Thompson) writes:

> . . . I have a standard radio in my car
> with 8 speaker wires coming out - positive and negative to two front and two
> rear speakers. I have a tape deck with four speaker wires - two to the right
> and two to the left speakers. My switch has four wires for the tape deck 
> connection (just right), and four wires for the radio connection (not right.)
> My question: What four wires should I use for the radio connection to the 
> switch? Should I leave the wires that aren't necessary (if any) connected to 
> something, or just clip it?

As you have said, the radio has positive and negative for each speaker --
and a *safe* assumption is that neither one is grounded.  The tape player
uses ground as one side for each speaker.  Unless you can *prove*
beyond a shadow of a doubt that the radio grounds one side of each
speaker, use a switch that switches all eight wires.  Wire the radio
so all eight wires are passed through when switched to "radio."  Wire
the tape player so one output wire and ground are switched to each speaker
when the switch is in the "tape" position.

					Steve Rice

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