40xwt (66T0)

Hi can anyone tell me if its possible to fit an ammeter to my 1999 40xwt outboard. have tried but when i connect it up as per instructions the tachometer stops working?? Connections are earth batt and alt - , positive and earth arent a problem but the alt - is ! i have been putting a wire into either green wire that goes to the rectifier either one thats when the tacho knocks out, suggestions plse !!! lee.

[boats.net]

An ammeter would need to go between red wire at voltage regulator and battery lead. It's easier to install a voltmeter at dash using the yellow(key on power) wire.

40xwt (66t)

ok so i take it i use the yellow wire as the alt - and red wire as positive and thn earth ?

lee

[boats.net]

No the yellow wire is just 12 volts with key on and can be used for a voltmeter, do not use for an ampmeter. I would not install an ampmeter on a outboard motor because it has to be installed in series.