where is the navigator serial number?

You should be able to get this off of the information screen, is the screen operating properly?

its actually under the unit.you can see it with a mirror and a flashlight.call the dealer,give them the serial # and they will give you the unlock code.or it might be on a small card with your manuals or on a sticker in the c\glove box or on the first page of the maintenance manual.

it should be in the honda book in i guess your glove compartment.