Troubleshooting Your ezDrive™ Thruster

Technical Troubleshooting Steps form 2 of 2 (Tige)

Technical Troubleshooting Guide

Please complete ALL required steps below and check boxes.


Your Thruster Serial Number:

Testing internal i-Box Connections

Remove iBox cover and ensure that nuts securing the A1 cable to solenoid, A2 cable to solenoid, power (+) cable, and power (-) cable are all tight to 4lb-ft. Test for voltage at iBox power supply inside iBox for minimum of 12.5 volts.


(Warning: During the next step, be sure not to touch the black and red wires together as this can cause instant short and potentially be dangerous)

iBox Function Text

Disconnect control harness from iBox. On the plug going to the iBox, use a jumper cable to connect:

[A] 12.5v power directly from Red wire to the Grey wire. Thruster should operate in one direction.

[B] Now apply 12.5v power to blue wire and confirm operation in the other direction

NOTE: Please contact ezDrive™ for plug location on vessels equipped in 2021 or earlier.


Please submit this form for further analysis by our team.

Testing Thermal Shutdown plug

Disconnect thermal shutdown plug going from thruster to iBox (small, black 2-barrel connector). Install jumper wire into the iBox side of plug end (into both barrels) and repeat step 2. 


Direct Power Test

Disconnect thruster power cables (A1 and A2) from iBox and connect directly to battery power. 


Diagnosis: The i-Box is the problem and needs to be replaced. Please submit this form.

Diagnosis: The Thruster motor is the problem. Please submit this form.

Control System Guide

Testing ezDrive™ Throttle Control

Switch Your Multimeter to the Continuity Setting

Connect the RED lead from your multimeter to the WHITE wire in the delphi plug on the harness coming from your throttle. Connect the BLACK lead from your multimeter to BROWN wire in the delphi plug. Activate the thruster switch control in both directions. One direction should give audible alarm from your meter signifying that there is continuity.

With the RED lead still connected to the WHITE wire in the delphi plug, swap the BLACK lead from your multimeter to the GREEN wire in the delphi plug. Activate the switch in the opposite direction. You should get an audible alarm from your meter signifying that there is continuity.


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Diagnosis: If one/neither direction works, then control is the problem.