G8 Pinouts for Harnesses(Radio, Fact. Amp, accessory voltage, etc.)

[SRG963]

Here is a chart that I used to splice into the factory stereo signal. *It should help out with the adding of aftermarket stereo systems.



I suggest a remote signal switch from your local car stereo shop to use for the remote wire.

[GRRRR8]

You and G8V8 need to chat! He is an electronics guru also.

[hotshot2003]

Also if you need to catch a 12 volt accessory to turn on the amp there is a small white connected directly above the factory amp with three wires in it. I don't remember which one is the accessory but you can check it with a volt meter and get it right there in the trunk.

[hotshot2003]

Use this thread to add more info as it becomes available. For now, here are the pinouts I've accumulated for the radio, factory amp, and a picture of the harness in the trunk above the factory amp with the wire color and description on the picture. This white plug is used to get an accessory 12V(aka remote turn on wire). Hope this helps, feel free to add any other documents or images you have related to G8 wiring.

4 Channel's of speaker outputs plug at radio:



Center Channel and Power connector at radio:



Other Harness for Onstar etc at Radio:



Factory amplifier harness:

[hotshot2003]

White plug for accessory voltage in trunk:



This plug is located above the factory amp on the underside of the rear deck. Wiring colors are described on the image.

[Chewy]

White plug for accessory voltage in trunk:



This plug is located above the factory amp on the underside of the rear deck. Wiring colors are described on the image.

NOT keyed right?

[hotshot2003]

The Brown and Blue wire is accessory. It is +12V only when the key is in the ignition and turned forward. The car doesn't have to be cranked just turned to the first forward position for this wire to be hot. It works good as a turn-on wire. The only thing is that when you kill the car and take the key out your radio stays on until you open the door...this wire loses +12V as soon as you cut the key off and remove it.

[Chewy]

The Brown and Blue wire is accessory. It is +12V only when the key is in the ignition and turned forward. The car doesn't have to be cranked just turned to the first forward position for this wire to be hot. It works good as a turn-on wire. The only thing is that when you kill the car and take the key out your radio stays on until you open the door...this wire loses +12V as soon as you cut the key off and remove it.

Some amps have a 10 minute timer now don't they?

When I was into the stereo stuff I had Sound Stream 10" subs and amps (when they made good stuff) and those 10's were AWESOME! Probably one of the best in the mid 90's IMO.

[hotshot2003]

A good amplifier should power down silently and immediately when the remote turn on voltage goes to 0. I haven't decided on what sub configuration to do in the trunk yet. I'm thinking a pair of L7 8's in a dual reflex series tuned bandpass, a single 10'' CVX in the same enclosure type, or possibly 2 CVX 10's in a single reflex bandpass. It'll take a little trial and error but should sound really good when I'm done...

[hotshot2003]

I posted all the connector data sheets I had in the DIY section. Feel free to add to it if you guys have accumulated any other information. Thanks.