Re: CD changer wiring (FM type)

[Chris Woodward <cwoodwar@bellsouth.net>]

Rob Winchell wrote:

> All -
>
> I recently bought a CD changer from a fellow lister. Sony CDX-U303, FM
> modulated type. I'm installing it myself, but am running blind as far as the
> wiring goes.
>
> The CD controller/modulator has 4 wires - red, yellow, black and blue/red.
> It appears in it's previous installation the blue/red wire was not used at
> all. Going from the Bentley diagram of the stock CD changer, the red and
> yellow wires splice in with same wires going to radio, using 1A and 3A fuses
> respectively. Black wire is ground. So, what's the blue/red wire for?
>
> If anyone could help me out, or just give me a pointer to someplace else
> this is discussed I'd appreciate it.
>
> BTW, car is 91 200Q with Bose Gamma radio.
>
> Thanks,
> Rob Winchell
> 91 200Q
> 87 4kCS

I wouldn't worry about it.  These things need 3 wires.  One, as you have
pointed out, is ground.  The other two are for power.  The one with the higher
rated fuse is for a constant +12v, and the other is for switched +12v, to
connect to your radio's power antenna wire or if there isn't one of those to
connect to a circuit which is on when the car is on.  It doesn't require much
current, so don't worry about where you connect it.  Just make sure it's a
switched circuit so you don't run your battery down if you park your car for a
while.

Chris
'97A4ta
'90 80a (soon)