This guide explains how to replace the controller on a JOFEN T6/T10 step by step. It covers opening the deck, recording the original wiring, transferring the connections to the new controller, securing it in place, and testing the scooter before reassembly. Following the original wiring layout carefully is the key to avoiding connection mistakes during the repair.
Before You Start
Switch off the scooter, unplug the charger, and work in a clean, dry area. Prepare the replacement controller, basic hand tools, and a phone or camera for taking reference photos. Before disconnecting any wiring, make sure the replacement controller matches the original in voltage, connector type, pin count, and overall wiring layout.
STEP 1 ：Remove the Deck Cover
Remove the screws around the deck cover and carefully lift the cover away. If the scooter uses a gasket, sealing strip or waterproof sealant, avoid damaging it. Once the deck is open, locate the battery, controller and main wiring harness.
STEP 2 ：Photograph the Original Wiring
Before unplugging anything, take clear photos of the controller wiring and connector positions. Make sure the battery, motor, Hall sensor, display, brake, and other plugs are visible.These photos will help you reconnect the new controller correctly.
STEP 3 ：Replace the Connections One by One
Disconnect and reconnect the controller plugs one at a time. Remove one plug from the old controller, then connect the matching plug to the new controller before moving to the next.This helps keep each connection in the correct position and avoids confusion if several connectors look similar
STEP 4 ：Compare the Old and New Controllers
Place the original and replacement controllers side by side before installation.Check that the voltage rating, connector quantity, connector shape, pin count, wiring layout, size, and mounting position match.
STEP 5 ：Install the New Controller
Place the replacement controller in the same position as the original one.Make sure it is securely mounted and that no wires are trapped underneath or pressed against sharp edges.
STEP 6 ：Check All Connections
Before powering on the scooter, inspect all connectors and wiring one more time.Make sure every plug is fully inserted, no pins are bent, and no wires are loose, trapped, or damaged.
STEP 7 ：Reinstall the Deck Cover
Restore the original gasket, sealing strip, or waterproof material before reinstalling the deck cover.Make sure no wires are trapped around the edges, then tighten the screws evenly.
After Installation
After the controller replacement, test the scooter at low speed before returning to normal use. Check that acceleration, braking, motor response, display, lights, turn signals, and horn all work normally, and make sure no error codes appear.
During the first few rides, pay attention to unusual motor noise, vibration, heat, or burnt smells. If anything feels abnormal, stop using the scooter and recheck the controller connections and wiring before continuing.
Frequently Asked Questions
The scooter does not turn on after replacing the controller. What should I check?
First check the main battery connector and make sure it is fully connected. Then check the display or communication connector and confirm that no plug has been missed or inserted incorrectly.
The display turns on, but the motor does not run. What could be wrong?
Check the motor phase wires, Hall sensor connector, and brake cut-off wiring. A loose motor connection or an active brake cut-off signal can prevent the motor from running.
The motor shakes or runs roughly after the replacement. What should I do?
Turn the scooter off immediately and recheck the motor and Hall sensor connections. Incorrect or loose motor wiring can cause vibration, rough operation, or abnormal noise.
The controller or connectors become very hot after replacement. Is this normal?
Some warmth during use can be normal, but excessive heat is not. Stop using the scooter if the controller, wiring, or connectors become unusually hot, especially if there is a burnt smell or unstable power.
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