Headlight Board Pin-out and Test Points

15 Pin Connector

P/N: TE Connectivity 4-643814-5

When looking at the connector as shown, pin 15 is on the left and pin 1 is on the right. The pin numbers are also molded into the plastic of the connector body.

To probe these pins you leave the connector attached to the headlight, and you can simply put a multimeter probe where the wire enters the connector, you will see metal tabs sticking up around the wires, place the probes on those metal tabs.

Use caution when probing the connector that you do not let the probes touch and create a short circuit.

For wires with 2 colors, the second color listed is the stripe.

Test Points

If your display does not turn on:

Pins 1 & 5 (Display Power) – with battery turned on, this should read battery voltage which will be between 27V and 59V, depending on bike model and state of charge.

If your display turns on, but motor does not run:

Pins 1 & 2 (5V Power) – with battery and display turned on, this should read 5V.

Pins 1 & 8 (Throttle) – with battery and display turned on,  this should read 0.9V.

If your bike runs, but headlight or taillight does not work:

Pins 11 & 12 (Headlight Power) – with battery turned on, this should read battery voltage which will be between 27V and 59V, depending on bike model and state of charge.

Pins 1 & 10 (Headlight Trigger) – with battery and display turned on, and headlight enabled on the display (hold up arrow), this should read 6V.