This guide provides step‑by‑step instructions for installing Lowrance HDS transducers on a boat. It details recommended tools, proper transducer location, and how to align the ratchets on both one‑piece and two‑piece brackets so the transducer face is parallel to the water surface.
The manual also covers securing the transducer to the transom, routing the data cable, and wiring diagrams for HDS‑5/7 (RS‑422) and HDS‑8/10 (RS‑232) units. Additional information includes optional TMB‑S trolling‑motor brackets, hull‑mount epoxy procedures, and safety warnings for installations on boats with flotation material.
| Com 1 (RS‑232) transmit wire color | yellow |
|---|---|
| Com 2 (RS‑232) transmit wire color | blue |
| Com 1 (RS‑422) transmit wire colors | yellow and blue |
| One‑piece bracket drill bit size | #29 (0.136") |
| Two‑piece bracket drill bit size | #20 (0.161") |
Use a #29 (0.136") drill bit for the one‑piece bracket.
Insert the ratchets with the letter “A” aligned to the dot on the bracket; when the transducer face is parallel to the ground, the “A” position is correct.
Yellow and blue wires transmit, orange and green wires receive, and the shield is ground.