This article explains how to troubleshoot common light control system issues on the Kaabo Mantis King GT. 

Use this article if your scooter has:

• Brake lights staying on
• Brake lights not flashing correctly
• Horn not working
• Headlights not working
• Tail lights not working
• Front spot lights not working
• Turn signals not flashing
• Side light strips not working
• Lights behaving incorrectly when the display is off

Before You Start

Please prepare the following:

• Your order number
• A photo or video of the issue
• A photo of the display
• A video showing the light issue
• Confirmation whether the scooter powers on normally
• Details about whether the issue started after:
  • rain or water exposure
  • a crash or impact
  • transport
  • modification
  • display replacement
  • third-party repair

If there is visible damage, please also prepare clear photos.

Safety Warnings

• Do not continue riding if there is visible wiring damage, smoke, burning smell, overheating, or water exposure.
• Do not work on wiring while the scooter is powered on unless specifically required for testing.
• Do not force connectors together.
• Stop and contact support if you are unsure.

Brake Light Stays On Without Pressing the Brake

This issue may be caused by:

• A brake lever electronic cut-off sensor fault
• A brake lever wiring issue

Step 1 – Check the Brake Lever Sensors

Turn the display on but do not turn the scooter off during this test. 

Disconnect the waterproof connector for the right brake lever electronic cut-off sensor.

If the brake light turns off

The right brake lever may be faulty.

Please contact support with:

• A video showing the test
• A photo of the right brake lever connector

If the brake light stays on

Reconnect the right brake lever connector and disconnect the left brake lever connector.

If the brake light turns off after disconnecting the left brake lever

The left brake lever may be faulty.

Please contact support with:

• A video showing the test
• A photo of the left brake lever connector

If the brake light still stays on

Further inspection is required.

Contact support with:

• A video showing the issue
• Photos of the brake lever wiring

Right Brake Activates Brake Light but Left Brake Does Not Flash

This issue may be caused by:

• Loose brake wiring
• Incorrect wiring connection
• Left brake lever fault
• Main line wiring fault

Step 1 – Check for an Exclamation Mark on the Display

Turn the display on and hold the left brake lever. 

Check whether an exclamation mark appears on the display.

If no exclamation mark appears

Open the battery compartment cover and inspect the SM9 connector where the left brake lever main line connects. 

Check for:

• Loose wiring
• Incorrect connector position
• Unplugged connections

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

If the exclamation mark appears normally

Continue to Step 2.

Step 2 – Check the Left Brake Lever

If the wiring appears normal but the issue remains, the left brake lever may require further inspection. 

Please contact support with:

• A video showing the brake light behaviour
• Photos of the left brake lever wiring

Step 3 – Check the Left Brake Main Line

If the issue still remains, the left brake main line may have an internal wiring fault. 

Please contact support with:

• Photos of the wiring
• A video showing the issue

Left Brake Activates Brake Light but Right Brake Does Not Flash

This issue may be caused by:

• Loose brake wiring
• Incorrect wiring connection
• Right brake lever fault
• Main line wiring fault

Step 1 – Check for an Exclamation Mark on the Display

Turn the display on and hold the right brake lever. 

Check whether an exclamation mark appears on the display.

If no exclamation mark appears

Open the battery compartment cover and inspect the SM9 connector where the right brake lever main line connects. 

Check for:

• Loose wiring
• Incorrect connector position
• Unplugged connections

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

Step 2 – Check the Right Brake Lever

If the wiring appears normal but the issue remains, the right brake lever may require further inspection. 

Please contact support with:

• A video showing the brake light behaviour
• Photos of the right brake lever wiring

Step 3 – Check the Right Brake Main Line

If the issue still remains, the right brake main line may have an internal wiring fault. 

Please contact support with:

• Photos of the wiring
• A video showing the issue

Horn Does Not Work

This issue may be caused by:

• Loose horn wiring
• Multifunction switch wiring issue
• Horn fault
• Junction box fault
• Multifunction switch fault

Step 1 – Check the Horn Wiring Connection

Open the battery compartment cover and inspect the SM8 connector between the multifunction switch and the junction box. 

Check the grey wire for:

• Loose connections
• Incorrect connection position
• Unplugged wiring

If a wiring issue is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

Step 2 – Check the Multifunction Switch Wiring

Inspect the purple wire at the SM8 connector between the multifunction switch and the junction box. 

If the wiring is loose or incorrect

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 3.

Step 3 – Further Inspection Required

If the horn still does not work after the wiring checks, further inspection may be required for:

• The horn
• The junction box
• The multifunction switch 

Please contact support with:

• A video showing the horn issue
• Photos of the SM8 connector area

Headlight Does Not Work

This issue applies if all other lights work normally but the headlight does not turn on. 

Step 1 – Check the Headlight Wiring

Open the battery compartment cover and inspect the brown wire at the SM8 connector between the multifunction switch and the junction box. 

If the wiring is loose or incorrect

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

Step 2 – Further Inspection Required

If the issue remains after the wiring inspection, further inspection may be required for:

• The headlight
• The junction box 

Please contact support with:

• A video showing the headlight issue
• Photos of the connector area

Right Rear Tail Light Does Not Work

This issue may be caused by:

• Loose SM2 connector wiring
• Tail light fault

Step 1 – Check the Tail Light Connector

Open the battery compartment cover and inspect the SM2 connector between the right rear tail light and the junction box. 

Check for:

• Loose wiring
• Incorrect connector position
• Disconnected wiring

If a wiring issue is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Further inspection of the tail light may be required.

Contact support with:

• A video showing the issue
• Photos of the SM2 connector

Left Rear Tail Light Does Not Work

This issue may be caused by:

• Loose SM2 connector wiring
• Tail light fault

Step 1 – Check the Tail Light Connector

Open the battery compartment cover and inspect the SM2 connector between the left rear tail light and the junction box. 

Check for:

• Loose wiring
• Incorrect connector position
• Disconnected wiring

If a wiring issue is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Further inspection of the tail light may be required.

Contact support with:

• A video showing the issue
• Photos of the SM2 connector

Left Front Spot Light Does Not Work

This issue may be caused by:

• Loose SM2 connector wiring
• Spot light fault

Step 1 – Check the Connector Wiring

Open the battery compartment cover and inspect the SM2 connector between the left front spot light and the junction box. 

If loose or disconnected wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

The left front spot light may require further inspection.

Contact support with:

• A video showing the issue
• Photos of the connector area

Right Front Spot Light Does Not Work

This issue may be caused by:

• Loose SM2 connector wiring
• Spot light fault

Step 1 – Check the Connector Wiring

Open the battery compartment cover and inspect the SM2 connector between the right front spot light and the junction box. 

If loose or disconnected wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

The right front spot light may require further inspection.

Contact support with:

• A video showing the issue
• Photos of the connector area

Left Turn Signal Does Not Flash

This issue may be caused by:

• Loose multifunction switch wiring
• Loose turn signal wiring
• Junction box fault

Step 1 – Check the Turn Signal Indicator

Turn the display on and activate the left turn signal. 

If the indicator light does not turn on

Open the battery compartment cover and inspect the blue wire at the SM8 connector between the multifunction switch and the junction box. 

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

The multifunction switch may require further inspection.

Contact support with:

• A video showing the issue
• Photos of the SM8 connector

If the indicator light turns on

Continue to Step 2.

Step 2 – Check the Left Turn Signal Wiring

Inspect the SM2 connector wiring between the left front/rear turn signals and the junction box. 

If loose or disconnected wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Further electrical testing may be required.

Please contact support with:

• A video showing the issue
• Photos of the SM2 connector area

Right Turn Signal Does Not Flash

This issue may be caused by:

• Loose multifunction switch wiring
• Loose turn signal wiring
• Junction box fault

Step 1 – Check the Turn Signal Indicator

Turn the display on and activate the right turn signal. 

If the indicator light does not turn on

Open the battery compartment cover and inspect the green wire at the SM8 connector between the multifunction switch and the junction box. 

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

The multifunction switch may require further inspection.

Contact support with:

• A video showing the issue
• Photos of the SM8 connector

If the indicator light turns on

Continue to Step 2.

Step 2 – Check the Right Turn Signal Wiring

Inspect the SM2 connector wiring between the right front/rear turn signals and the junction box. 

If loose or disconnected wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Further electrical testing may be required.

Please contact support with:

• A video showing the issue
• Photos of the SM2 connector area

Left Side Light Strip Does Not Work

This issue may be caused by:

• Loose wiring
• Light strip fault
• Light strip controller fault

Step 1 – Check the Wiring Connection

Open the battery compartment cover and inspect the wiring between the left side light strip and the junction box. 

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

Step 2 – Test the Left Light Strip Controller

Connect the right side light strip to the left side light strip controller output terminal and turn the lights on. 

If the right light strip works

The left side light strip may be faulty.

Please contact support with:

• A video showing the test
• Photos of the connectors

If the right light strip also does not work

The light strip controller may require further inspection.

Contact support with:

• A video showing the test
• Photos of the controller wiring

Right Side Light Strip Does Not Work

This issue may be caused by:

• Loose wiring
• Light strip fault
• Light strip controller fault

Step 1 – Check the Wiring Connection

Open the battery compartment cover and inspect the wiring between the right side light strip and the junction box. 

If loose or incorrect wiring is found

Reconnect the wiring securely and test again.

If the wiring appears normal

Continue to Step 2.

Step 2 – Test the Right Light Strip Controller

Connect the left side light strip to the right side light strip controller output terminal and turn the lights on. 

If the left light strip works

The right side light strip may be faulty.

Please contact support with:

• A video showing the test
• Photos of the connectors

If the left light strip also does not work

The light strip controller may require further inspection.

Contact support with:

• A video showing the test
• Photos of the controller wiring

Lights Work While Display Is Off

If all lights still operate normally while the display is turned off, the display MOS may require further inspection. 

Please contact support with:

• A video showing the issue
• A photo of the display
• Details about when the issue started

When To Contact Support

Please contact support if:

• The issue remains after completing these checks
• You are unsure how to complete a step
• There is visible wiring damage
• There was water exposure, crash, impact, modification, or third-party repair
• A connector appears melted or damaged
• Internal electrical components may require inspection
• The scooter is unsafe to ride

What To Send Support

Please provide:

• Your order number
• A photo/video of the issue
• A video showing the light behaviour
• A photo of the display
• Photos of visible wiring or connector damage
• Confirmation of:
  • water exposure
  • crash or impact
  • modifications
  • third-party repair
• Details of troubleshooting already completed

Important Safety Notes

• Do not continue riding with unresolved electrical faults.
• Do not ride with visible wiring damage, smoke, burning smell, or water exposure.
• Do not work on wiring while the scooter is powered on unless specifically required for testing.
• Do not force connectors together.
• Stop troubleshooting and contact support if unsure.