Dig Tach, does it have a light?

[mobilefamily]

I have a 6Y5-8350T-82-00 Tachometer, but it doesn't seem to be lit. I can't find any info on wiring or lights in my motor owner's manual. Can someone please send me a manual or advise if I can hook up a backlight? It would be very helpful. Thanks.

[boats.net]

The blue wire on back of tach is the light wire. Connect to blue wire to Nav light switch so backlight in gauge will come on when turn lights on or you can connect blue gauge wire to yellow wire at gauge and backlight will come on when turn ignition key on.

[mobilefamily]

Thanks for the quick reply. That is really helpful.