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GHP 12 Drive Unit and Rudder Feedback Unit Wiring Reference

This document contains common drive unit and rudder feedback unit wiring connections on a variety of drive units and rudder feedback units. 
This document is for reference only, and Garmin is not responsible for its contents or for the consequences of following the suggestions included below. 

Connections are subject to change at any time and Garmin is not responsible for updating any of the information or suggestions included below. Use the 

information and suggestions included in this document at your own risk. 
For the most reliable connection information available you must consult your drive unit or rudder manufacturer before wiring the GHP 12.

Drive Units

Manufacturer

Motor (+) 

(Red)

Motor (-) 

(Black)

Clutch (+) 

(Blue)

Clutch (-) 

(White)

Notes

Raymarine™

Red

Black

Red

Blue

Octopus™

Red

Black

Green

White

Jefa™

Red

Black

Red

Black

Hy-Pro™

Red

Black

Red

Black

LeComble & Schmitt™

Red

Purple

n/a

n/a

Clutch requires LeComble & Schmitt connector

Lewmar™

Blue

Black

Blue

Brown

3-Wire Rudder Feedback Units

Manufacturer/Model

5 Vdc (Red) Ground 

(Black)

Feedback Signal 

(Yellow)

Notes

Raymarine

Red

Green

Blue

Octopus

Red

Black

White

Simrad™ SLF 12

n/a

Black

White

SLF 12 requires 12 V supply. Connect the red wire on SLF 12 to an external 12 V power source.

Vetus™

To use Vetus feedback, remove the circuit board and connect the Garmin cable directly to the 

potentiometer.

TMQ™

Red

Blue

Green

Teleflex™ Smartstick

Red

Black

White

LeComble & Schmitt

Blue

Brown

Yellow

Set all switches to 

ON

.

2-Wire Rudder Feedback Units

To use a 2-wire rheostat 

 for rudder feedback, you must add an external resistor 

 of equal resistance to the feedback unit, as shown in the following diagram.

Wire

Color

Black

Yellow

Red

Manufacturer

Resistance

Notes

VDO™

180 ohms

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