Dual DXV3D installed & steering wheel wiring question

Fountainhead

Hey, most steering wheel controls, SWC, are independent of the rest of the car. If the radio has "Programmable" SWC then there will be 3 wires, or 4. 1. +5V, 2. SWCA 3. SWCB 4. SWC GND.
Usually use +5, SWC A, and GND to the correct wires from the buttons on the Steering wheel and you're good to go....IF the head unit has programmable SWC. GM and other cars can use CAN enabled SWC, as well as some VW and Toyotas. Usually they're resistive ladder type, I'd check further.