Alternator woes continue 😢

[Cheeky Girl]

Hi now installed the new alternator but the rev counter is not working now . The Black/grey cable is connected to the W terminal. What can I now check ? Is there a way to see if the W terminal is working? Or is there another issue that we have caused ? The rev counter briefly showed a few revs on first startup with new alternator but now nothing
VP2030 2002 boat
Thanks

 

[Refueler]

Stupid question ... Do you still have the old alternator ? was it working when removed ?

If yes to both questions - I would be inclined to put old back and see if rev counter is working ... if not - then I suspect counter has failed.

The question would then be ... Why ?

 

[Cheeky Girl]

Still have old alternator. It wasn’t working but the rev counter was new alternator is now charging but no revs

 

[Boater Sam]

Check the econnections. You can measure the voltage on the W terminal with a meter but it is an AC voltage not DC.

 

[Iliade]

The inference is that the old alternator was producing electricity at its heart and the issue with it was peripheral - regulator, wiring etc.

The revcounter typically requires three inputs: +ve, -ve and W, which is the un-rectified AC output. It should be possible to check all of these with a multimeter:

Rev Counter - Fault diagnosis?


I'm on much the same venture as soon as I can find the boat's multimeter...