Wiring diagram for 8g?

Anyone have a wiring diagram for a 03 stereo? I took my G to an audio shop and they were going to hook it up using a wiring harness But it didn't work,so they took a closer look at my stock harness and said it looked like the previous owner messed it up a bit and they didn't feel like trying to figure it out. Anyone have a wiring diagram for the stock harness? I wanna see if maybe I can figure it out and wire it myself. Otherwise I'll have to pay them a lot to replace the whole stock harness

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