I need a wiring diagram for my Sony CDX-GT320 because I'm wiring it into a 2000 Mercury Mountaineer

It is never as straightforward as you think because the entertainment system is monitored and run by the body control module and put warning chimes and things like the blinker clicker through the audio system.

https://www.google.com/search?q=2003+Mercury+Mountaineer+radio+and+entertainment+wiring

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https://docs.sony.com/release/CDXGT57UP_install_EN_FR.pdf

diagram for sony cdx gt57up Bing images

here

Enter this into your web browser and press return, I am sure what you are looking will be there

"2010 Mercury Mountaineer 4.0L wiring diagram"

See the wiring diagram on the final page of this installation manual: http://www.docs.sony.com/release/CDXM600install.pdf

just go to google and download it just type in google what you are looking for and you will find it and from there you will get to
just type in sony cdx-ra700 wiring diagram

If you buy a wiring harness from this guy he will send you a wiring diagram. Copy and paste the web address.
Here you go bud:

http://cgi.ebay.com/SONY-wire-WIRING-Harness-XPLOD-XR-CA430-CDX-MP30-sn6_W0QQitemZ200417888633QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2ea9d64979

Here is a link to Sony for your CDX-4000X wiring pin outs with color code.
http://www.docs.sony.com/release/specs/CDX-4000X_Spec_Sheet.pdf

Here is a link to Sony for your CDX-GT420ip wiring diagram .
http://www.docs.sony.com/release/CDXGT420IP_install_guide.pdf
And here is a link for your operating instructions.
http://www.docs.sony.com/release/CDXGT420IP.pdf

http://safemanuals.com/annexe_Installation%20Guide_SONY_CDX-CA650-_E.htm

Good Luck

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