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BMW 5-Series (G30) Forum iDrive, Audio, Bluetooth, Phone, Cameras, Electronics + Coding HK wiring question

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      05-07-2025, 07:31 AM   #1
hatella
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Drives: BMW 540i xdrive
Join Date: Aug 2023
Location: Wisconsin

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HK wiring question

I know there are many threads on this topic and the easiest method is to use the technicpnp harness, but unfortunately they are out of stock. I dont mind splicing the harness since I'll never have a need to revert back to stock. Can anyone confirm if the sub wires on HK option 688 are still Blk/Rd, Blk/Brwn and Blue/Rd, and Blue/Brwn? I'll be using the Wavetech Link2, can I tap power from the HK harness itself? Or should I run a fused power wire from the fuse box. Any help is greatly appreciated. Thanks!

*EDIT*

Just following up in case anyone else ever runs into this. 2019 540 with Harmon Kardon (688). The subwoofer wires are the same Blue/Red, Blue/Brown, Black/Red, and Black/Brown. Then for the +12v constant I purchased the add a circuit fuse kit and tapped into fuse F206 in the fusebox. So the LOC turns on when the engine is started, and turns off roughly 5 seconds after shutdown. To tap the wires in the factory amp harness I used the Wago 221-413 connectors. I would reccomend getting the TechnicPNP harness for your application as that would have made the install much easier, I would have went this route but the harness was on backorder.

Last edited by hatella; 05-12-2025 at 09:40 AM.. Reason: Update Post
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amp, harmon kardon, subwoofer, wavtech


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