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Old 01-30-2009, 06:29 AM
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SVXdc SVXdc is offline
Radio wiring harness guru
Subaru Gold Contributor
 
Join Date: Oct 2002
Location: Atlanta, GA
Posts: 615
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Re: SVX / Legacy radio compatibility

Quote:
Originally Posted by svxistentialist View Post
Of the five wires coming into the connector, only three of them get connected to the unit. These are the blue with pink stripe on one side on its own, the black over on the other side and the brown with the red stripe. These two are on the opposite side of the connector.

The two redundant wires are red [or pink maybe?] with a black stripe and a plain red wire.
Here is what you have:

Pin-out table for your 7-pin harness (from the car):
Code:
Pin Function                 Wire Color
1   +12V Accessory           Brown/Red
2   Illumination +           Red
3   +12V Battery             Blue/Red

4   Ground                   Black
5   Illumination – (Dimmer)  Red/Black
6   Power Antenna            NC
7   unused                   NC
Pin-out table for the matching 7-pin harness (going to your cage):
Code:
1   +12V Accessory   Red
2   Illumination +   NC
3   +12V Battery     Yellow

4   Ground           Black
5   Illumination –   NC
6   Power Antenna    NC
7   unused           NC
NC = No Connection

Quote:
Do I understand you that possibly one of these unused pair could be used for a dimmer connection? And the other is possibly a live for an aerial feed?
Both of your two "extra" wires are for illumination/dimmer.

Illumination + is open-circuit when the lights are off, and +12V when the parking lights or headlights are on.

Dimmer (Illumination –) is open-circuit when the lights are off, and a variable voltage when the lights are on. Voltage is determined by the dimmer ring on the stalk. This wire approaches 0 volts for "brightest" and +12V for dimmest (which is backwards from what you might expect). That's just the way Subaru does it.

The dashboard light bulbs are connected between these two lines.

Aftermarket radios that have a "dimmer" lead usually want you to connect it to the car's "Illumination +" wire.

[UPDATE: Pins 2 is Illumination +, pin 5 is Dimmer (illumination –). Wire colors were/are correct.]
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David C.
1996 Laguna Blue Pearl SVX L AWD
See my home page for SVX radio install/removal instructions and wiring harnesses

Last edited by SVXdc; 05-08-2010 at 04:14 PM.
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