winskate

This is the ADD-GM24, aka AOEM-GM24.
Can someone provide the line-level speaker pin-outs?
Just need the tapped (clear) portion connector.

RockoIV

I have the same harness in my system. I cut off the clear connector and spliced in RCA jacks that I got from radio shack and it works like a champ.

Mine had microscopic numbers on the pinout connector as you call it. I traced them back to the connector that goes into the stock harness using Komoman's reference for the stock line level outs for the C6 on his website.

#11 Right Rear Positive (Purple) goes to A11
#6 Right Rear Negative (Dark Purple) goes to A10

#15 Right Front Positive (Grey) goes to B11
#8 Right Front Negative (Grey) goes to B10

#13 Left Rear Positive (Green) goes to B8
#7 Left Rear Negative (Green) goes to B9

#17 Left Front Positive (White) goes to A8
#9 Left Front Negative (White) goes to A9

Hope that helps.

Dave

ben dover

Good info - thanks.

winskate

Dave,

You are the man. Thanks for the pinout info.
I only need one output to connect a sub-amp. Does the "chimes" signal come thru the left front output?

pentavolvo

chimes is left front

IMO go with the rear for the sub, so you can use your fader to back off the sub in a way if its too much bass

Those pinouts are correct

winskate

I used the right rear (purple) wires for input to the amp. It keeps going into protection mode, I'm getting 5.5 volt DC to ground, from each wire. What's going on here?

pentavolvo

idk what you did but you should take the rear left and rear right and solder on rca plugs and run those rcas to your amp

otherwise you sure ur sub is wired properly to the amp

winskate

I don't know what the problem is here. I think the HU has some control over the keyless entry. Just sitting in the car, with radio out of dash, I get 5.5 VDC from every audio line out, measured to the frame of radio. These voltages are taken from the rear stock connector, with no ADD-GM in the circuit. Looks like I'll go to plan B, and tap off speakers.

pentavolvo

add24 is the way to go splice in the rca's and plug it in, i do this regularly and never a problem. tapping at the speakers especially for a sub wont work the lows only go to the subs in the doors

winskate

I hear you. My HU connector matches the Kokoman photo, and measured voltages to frame. My amp will not take 5v DC on the sig input. This is a stock 07, has GM changed it's wiring scheme? I'm thinking of adding two DC blocking caps to sig wires. Comments?

pentavolvo

That signal is AC not DC if i recall. Ive done this on 05, 06, and 07 C6's never a problem. Splice the rcas in and hook it up