Nothing is more frustrating than soldering everything together, only to find that the unit won’t power on, or worse, that you’ve blown a fuse because you confused the dimmer wire with the ignition wire.
In this guide, I’ll break down the color-by-color, explain what each wire does, and cover the common pitfalls (like the dreaded "blue/white" confusion). Quick Reference: The 16-Pin Wiring Harness The KDC-BT555U uses a standard 16-pin JVC/Kenwood harness . You should never cut the plug off the back of the stereo; instead, use this harness to connect to your car’s factory wiring (or an aftermarket adapter). Kdc-bt555u Wiring Diagram
If you’ve just picked up a JVC KDC-BT555U (or the similar Kenwood Excelon variant), congratulations—you’ve got a solid, Bluetooth-enabled single-DIN head unit. However, a stereo is only as good as its installation. You should never cut the plug off the
Here is the pin-by-pin breakdown: