robmack wrote:Read this thread:  https://www.motobrick.com/index.php?topic=8964.0

The pin numbering on the diagram matches common pin numbering on automotive relays:
85 & 86 = relay coil
30 = common terminal
87 = normally open terminal

What specifically is driving you crazy about this circuit?

BTW, this circuit will only detect neutral gear.  It will not allow you to indicate any other selected gear on your aftermarket gauge, if your gauge has that capability.

Roadstermac wrote:The thing is that I have that circuit from here
https://c59rstore.com/es/acewell/960-velocimetro-y-tacometro-acewell-ace-ca085.html?search_query=Neutral&results=13

And I think it’s Makes the same As the 3 relays, it works but, when I change to gear one or any other, the neutral downs disappear, I’m not able to connect the gears Coming from the New speedo to appear on the screen . .

robmack wrote:As I said in my last sentence in the post I made above, you cannot expect this product you bought to be able to indicate each and every gear you select in the gearbox.  It's purpose is only to detect the neutral gear.  When you select any other gear on the bike, the neutral light on your gauge will extinguish, as you point out.

If you want to have the ability to show the gears on the gauge as you select them, then you  will need a different product, either a Marulabs BEP 3.0 or a Tenet. Those two products have digital logic in them to drive the display capability of your gauge.

I'll answer your question about the blue wire and about energizing the bike to start.  If you look at the diagram I linked to in my first reply, you will note that there is a diode.  You will have to add this same component on your bike in addition to the relay product you bought and installed.  A good diode to select will be a 1N4001. The cathode of a diode is indicated on the body of a diode by a white stripe.  The lead closest to the white stripe is the cathode; the other lead is the anode.  Connect the anode of the diode to the blue wire coming out of the relay and the cathode of the diode you will connect to the Black/Green wire that comes from Pin 5 of the OEM cluster connector.  This will solve your problem, allowing you to start the bike when it is in neutral.  In the meantime, to start your bike, you will have to pull in the clutch handle until you can make this modification to your bike.

Thanks. I’ll do it. 

Laitch wrote:

Roadstermac wrote:The thing is that I have that circuit from here
https://c59rstore.com/es/acewell/960-velocimetro-y-tacometro-acewell-ace-ca085.html?search_query=Neutral&results=13

And I think it’s Makes the same As the 3 relays, it works but, when I change to gear one or any other, the neutral downs disappear, I’m not able to connect the gears Coming from the New speedo to appear on the screen . .

That device you bought only shows Neutral and enables starting in Neutral. It is not designed to show any other gear on the speedometer display. Which Acewell model do you have?