[Martin]

Hi Frank, I’m a little confused by some things you say, but mostly, your use of the word “grounded”. I take it that you are connecting the yellow wire to a separate switch that you have installed yourself, rather than connecting to a ‘switched live’ somewhere in your bike’s wiring harness?

If so, there is no need for anything to be “grounded”, which in technical terms means the same as ‘earthed’. The yellow wire is simply a signal carrier to let the main unit know that it needs to turn on.

So, in your case, you have one wire coming directly from the battery to your switch. I assume that this wire is connected to the Positive (+) terminal on the battery? The yellow wire needs to be connected to the other side of your switch. So, when you turn your switch ‘ON’, power goes from the battery, through your switch, then down the yellow wire into the main unit.

Remember, this yellow wire is simply carrying a very low power signal to let the unit know that it needs to turn on. It is not powering the unit. But there is no need for anything to be “grounded”, so that is what is confusing me from what you have posted.

When you turn your switch ‘OFF’, it interrupts this low power signal and so the main unit turns off. I hope this helps?

When the rear unit stays hot it is because it is running and recording constantly. This, again, suggests that your switch is not interrupting the power signal from your battery’s Positive (+) terminal to the yellow wire.

For your problem of erratic recording, “unit switches on but recording does strange things…”, how often do these things happen when the system is connected to your phone via WiFi and when it is not?