Faria Tach Signal Wire (What Should It Read?)

[bigbrowndog]

Have a Faria tach attached to my 1997 Johnson 90 SPL. It doesn't move at all, so I am figuring it is either the tach or a faulty wire. Charging system works fine, and shows 12-13 volts on the Amp guage next to the tach. <br /><br />First, I cleaned all the terminals to see if it is a corroded connection. No change. Next I want to check the signal wire from the motor to see if there is a break or ? What sort of voltage or ? should be coming from the signal wire to the tach? <br /><br />Thanks<br /><br />Ty

 

[angus63]

Re: Faria Tach Signal Wire (What Should It Read?)

ty<br />expect low voltage AC signal ... strength varies with rpm. Gray wire from harness.<br />good luck

 

[angus63]

Re: Faria Tach Signal Wire (What Should It Read?)

Ty<br />12-13 volts at all rpm does not sound like you are charging. Use a volt meter on the battery terminals with the motor off and compare with the motor running above 1500 rpm. You should see about a 2 volt difference. If not, along with the tach out, I'm afraid it points to a fried rectifier.<br />good luck