Greetings, So I went after this challenge to wire up the Alpine System on my 2021 Ram 1500 after I could find no clear instructions across the web. Special thanks to MBORO19Ram for the schematics in his post. They were 90% helpful, Crutchfield was stumped when I called about how to overcome this problem.
My plan was to change all my door and dash speakers and install a sub.
Equipment:
3.5inch Infinity Reference 3032cfx in the 3 dash locations
6x9 Infinity Reference 9633ix in the 4 doors
AudioControl LC2i Pro to wire in the sub
Sub: JL Audio ACS110LG-TW1
I used the process of elimination to figure out how to get a full range highpass signal to the AC LC2i Pro. Knowing that the sub had 3 wires running to its 3 voice coils, I figured I needed to find those to get the output signal out of the alpine amp. (Photos attached should explain) I did not use the sub wires, I used the rear Left and Right door speaker wires to pull the signal to my LC2i Pro. The small gray plug had some wires with colors that corresponded to speakers also creating some confusion for me. The epiphany came when I saw there was no input for the sub wires so I determined the large gray plug had to be the output harness.
As a Bonus the Alpine speakers are not paper and foam cones. They have a rubber surround and what looks like a polypropylene woofer cone. I cut the screen off for easier visibility. Photos attached.
Before I wired the speaker wires directly to the LC2iPro, I tested the connection by connecting them to the old speakers; It worked.
To make this long story short, the photos attached show the Alpine Amp plugs and my wiring solution.
I have got a ton of help from you guys so hopefully this helps as I try to give back.
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