The Napa 65 supports resistive analog steering wheel controls without needing an external interface for most older vehicles. Primary control wire. Key 2 (Brown/Black): Secondary control wire. Ground: Usually shared with the main chassis ground.

Remote Turn-On (REM):

Depending on the specific sub-model, there may be rear-mounted USB or 3.5mm AUX inputs. Installation Safety Notes Secure Connections:

. Sends a 12V signal to turn on external amplifiers when the head unit is powered up. Orange or Orange / White Illumination / Dimmer