I bought this board online and thought of a great project and use it as a kill switch for a motorcycle.

it’s a board that is activated through a remote (RF remote).

i installed it and tested, it works as intended but buggy.

How was it wired?
The board is powered directly from the 12v battery. Output (relay side), a wire was cut from the wiring harness (with the intention when the board is activated through the RF remote the motorcycle will shut off regardless of moving or idle until the board is turned off and the motorcycle returns to normal) then the 1st wire is attached to COM and the other cut wire on the NORMALLY CLOSED. The NORMALLY OPEN is left blank.

why/how is it buggy?
If the motorcycle is moving, the volt meter only shows 13–14v (its supposed to be 15v)
Now if lights are turned on, the volts drop to 11v until such time the motorcycle turns off while moving (due to lack of battery power) and to think the board was not yet activated.

another test was done - it did not consume power overnight.

any insights would be greatly appreciated.

 

I don’t understand what you are claiming is buggy. Do you think the relay board is responsible for dropping the voltage of the bike’s electrical system?

 

A couple things come to mind...

Is the relay rated for vibration duty?
There could possibly be a very high resistance at the NC contacts where when the voltage drops to 11 there is not enough for the Bike.
Where did you cut the wire from? The ignition?
Did you make sure the relay contacts can handle the load?

 

I bought this board online and thought of a great project and use it as a kill switch for a motorcycle.

it’s a board that is activated through a remote (RF remote).

i installed it and tested, it works as intended but buggy.

How was it wired?
The board is powered directly from the 12v battery. Output (relay side), a wire was cut from the wiring harness (with the intention when the board is activated through the RF remote the motorcycle will shut off regardless of moving or idle until the board is turned off and the motorcycle returns to normal) then the 1st wire is attached to COM and the other cut wire on the NORMALLY CLOSED. The NORMALLY OPEN is left blank.

why/how is it buggy?
If the motorcycle is moving, the volt meter only shows 13–14v (its supposed to be 15v)
Now if lights are turned on, the volts drop to 11v until such time the motorcycle turns off while moving (due to lack of battery power) and to think the board was not yet activated.

another test was done - it did not consume power overnight.

any insights would be greatly appreciated.

How much current is it taking in both modes,?
(IE when the relay is off and when the relay is on)

 

I don’t understand what you are claiming is buggy. Do you think the relay board is responsible for dropping the voltage of the bike’s electrical system?

yes, because if it’s removed the electrical system goes back to normal.

To think that the board is not yet activated

 

A couple things come to mind...

Is the relay rated for vibration duty?
There could possibly be a very high resistance at the NC contacts where when the voltage drops to 11 there is not enough for the Bike.
Where did you cut the wire from? The ignition?
Did you make sure the relay contacts can handle the load?

in regards to vibration duty, i have no idea. Even the seller is unsure

I have not measured that. I only checked for volts. Yes, from the ignition.

I check the datasheet, i think so.
It’s a srd-12vdc-sl-c relay 10A 30v 28vdc

The one thing i’m confused about is that it works smoothly the board turns on/off. But the problems starts if the motorcycle is now moving and even though the board is in the off state

 

How much current is it taking in both modes,?
(IE when the relay is off and when the relay is on)

when relay is off, it’s at zero even though it’s wired direct to battery. And to think the RF module is constantly active to detect in case the RF remote is pressed.

when relay is on (activated through rf remote) it only consumes 0.10mA.