Hello everybody,

We (my father and I) are building a VM77 kitcar with a F20c/S2000 engine. We want to instal an aftermarket ECU so we have a custom wiring. At this moment we are preparing the car for the first start. Now we want to wire the alternator but some (most) of the cables we can't connect because we dont have the standard ECU.

The connectors of the alternator can be seen in the picture below:



My first thoughts are:
connecting the black (+) wire to the +side of the battery
connecting the black/yellow wire to the +12v contact with the ignition switch.

and that's it.


Is this right? Or will the alternator not work?


Thanks already!!!

 

it will not work. The ecu controls the alernator output based on the signal it recieves from the alternator. This is done to reduce load and increase fuel economy.

 

Right now the engine is running well and I assume that the alternator works well. The voltage of the accu is around 14,5 volt.

We have connected the BLK/YEL wire and the WHT/BLU wire with light bulb.

 

That's fantastic. Make sure to watch for an overcharge condition. The system may not be regulating voltage as it's designed to.

 

Thanks T-SMAC, We will watch the voltage when driving.