Garmin GLADIATOR TR-1 Installation Setup Manual page 18

Fig.17
Compass
Ball
Installation of Compass Ball
Step Three: Adjusting Compass Ball
Readjust the ball if necessary and fi x it in position by tightening the thumbscrew.
See Fig.16. Make sure the that the wires from the Compass Ball are pointing
straight down, out the bottom; (toward the water) otherwise the Compass
Ball will not work properly. See Fig. 17.
Step Four: Connection
Connect Compass Ball to the ECU at connection #4.
Do not mount the compass near magnetic
devices such as radio speakers or electric
motors such as the autopilot pump motor.
18
# 4
(Electronic Control Unit)
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ECU