couldnt find anything online for the pinout of the din connector that goes from the stock radio to the stock amp, so i went ahead and pinned it myself. i used a cheap dso318 oscilloscope to verify the pin pairings, first i powered it with an external battery and found the pairs by playing music through the radio and changing the fade and balance to isolate each corner, then i used vehicle power with the negative grounded to the body so the negative in would be bonded to ground and make it so the positive pins would show the music waveform and the negative pins would show nothing (the speakers dont ground to the body though, they are in a closed loop with the amp). i threw in the 10 pin amp output connector for convenience.
here are the din pins in text form for posterity just in case the host ever dies:
MALE FEMALE
____________ ___________
| 7 U 6 | | 6 U 7 |
|3 8 1| |1 8 3|
| 5 4 | | 4 5 |
| 2 | | 2 |
‾‾‾‾‾‾‾‾‾‾‾‾ ‾‾‾‾‾‾‾‾‾‾‾
1: LEFT REAR -
2: LEFT FRONT -
3: RIGHT FRONT -
4: LEFT FRONT +
5: RIGHT FRONT +
6: LEFT REAR +
7: RIGHT REAR +
8: RIGHT REAR -
U: LOCATOR (NOT A PIN)
RING: BODY GROUND
