Lowrance 3500 Wiring Diagram

Most Lowrance 3500 series units (including the LMS-350A) use a . However, some variants use an 8-pin. The color codes below are based on the original Lowrance power/data cable (part number 99-57, among others). Always confirm with a multimeter before applying power.

If you are holding a cut harness or looking at the back of the connector, identifying the wires is the first step. While specific year models may have slight variations, the standard Lowrance "Red Connector" pinout used on the GlobalMap 3500 series is as follows: lowrance 3500 wiring diagram

Before diving into the wiring diagram, it is crucial to understand that the Lowrance 3500 typically utilizes a multi-pin "red" connector or a specific pigtail harness for power and NMEA data. Unlike modern units that often separate power and transducer cables, legacy units like the 3500 often bundle power and data communication into a single, heavy-duty plug. Most Lowrance 3500 series units (including the LMS-350A)

The primary goal of wiring this unit is twofold: Always confirm with a multimeter before applying power

The Lowrance 3500 draws about 0.8A to 1.2A at full brightness. Use stranded copper wire. Install a 3-amp in-line fuse on the red wire within 6 inches of the battery. Never rely on a fuse panel labeled “electronics” – the 3500 is sensitive to voltage drop.

Uses standard Lowrance 192 kHz transducers with . For digital gauges like the 3500, a narrow (8°) cone angle is often recommended for the best accuracy. Critical Safety Requirement

Lowrance 3500 (and its variant, the ) is a classic marine depth sounder and GPS receiver. Proper wiring is essential for accurate depth readings and protecting the unit's electronics. Power Connections operates on a 10 to 15 VDC (12-volt system)