Cobra 4600 Wiring Diagram Instant

| Wire Color | Function | Connection Point | | :--- | :--- | :--- | | | Main Power (13.8V DC) | Connect to positive battery terminal or main DC distribution panel via a 2A fuse (or 5A inline fuse as specified on the radio case). | | Black | Ground (Negative) | Connect directly to the ship’s negative bus bar or battery negative terminal. Do not rely on mounting bracket ground. | | Orange/Yellow | Memory Backup | Connect to a constant +12V source (unswitched). If left unconnected, the radio will forget stored channels and weather frequencies when powered off. |

| Connector Part | Wire/Core | Connection | | :--- | :--- | :--- | | Center Pin | Copper Center Conductor (RG-58/U or RG-8X) | Solder to pin. Carries the RF transmit signal. | | Outer Shell | Braided Shield | Connect to PL-259 connector body. Provides ground plane reference. | cobra 4600 wiring diagram

| Pin # | Wire Color (Typical Cobra Mic) | Function | | :--- | :--- | :--- | | 1 | Shield / Braid | Receive Audio Ground | | 2 | Red | Transmit (TX) – Switched to ground when PTT pressed | | 3 | White | Audio (Mic element) – Hot | | 4 | Black | Common Ground / Shield | | Wire Color | Function | Connection Point