My antenna in my 1990 maxima don't work where can i find the fuse for it

Wrong amp fuse or maybe you have a loose wire or a short somewherecausing the fuse to burn out?

Some radios have a fuse inside them also.
I've found car radio's in general to be not so very good.
I'd not pitch it out until you can find someone reliable to test it.
Watch out though, some folks have a "vested interest".
That means they want to sell you a new one.
Be blessed.

Here is a list of radio wiring harness wire color codes and what they do. I have given both with and W/O Bose.

Nissan Maxima Car Stereo Radio Wiring Diagram Radio Constant 12V+ Wire: Pink/Blue
Radio Ignition Switched 12V+ Wire: Blue/Black
Radio Ground Wire: Vehicle Chassis
Radio Illumination Wire: Red/Blue
Radio Dimmer Wire: Red/Orange
Radio Antenna Trigger Wire: Black/Red
Front Speakers Location: Doors
Left Front Speaker Wire (+): Blue/White
Left Front Speaker Wire (-): Blue/Yellow
Right Front Speaker Wire (+): Brown
Right Front Speaker Wire (-): Brown/White
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Red
Left Rear Speaker Wire (-): Green
Right Rear Speaker Wire (+): Blue
Right Rear Speaker Wire (-): Pink
1997 Nissan Maxima with Bose Stereo Wiring Diagram W/Bose
Car Radio Battery Constant 12v+ Wire: Pink/Blue
Car Radio Accessory Switched 12v+ Wire: Blue
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Red/Blue
Car Stereo Dimmer Wire: Red/Yellow
Car Stereo Antenna Trigger Wire: Black/Red
Car Stereo Amp Trigger Wire: Green/White
Car Stereo Amplifier Location: Each speaker has its own amplifier located at each speaker.
Left Front Speaker Positive Wire (+): Yellow
Left Front Speaker Negative Wire (-): Brown
Right Front Speaker Positive Wire (+): Violet
Right Front Speaker Negative Wire (-): Light Green
Left Rear Speaker Positive Wire (+): Red
Left Rear Speaker Negative Wire (-): Green
Right Rear Speaker Positive Wire (+): Pink
Right Rear Speaker Negative Wire (-): Blue

The original radio is a BOSE system and it has a buit in amp. So if you replaced the deck you need to replace the speakers all so. Don't cut the wires to hook-up the deck buy an addapter KIT. It's not just the stereo that runs though that harness the factory alarm does all so and that will cause you problems. Anyway back to the stereo you need to add an amplifier and problem sovled.

Go to this link http://www.2carpros.com/forum/automotive_pictures/12900_f_9.jpg for your diagram

If you have a cigarette lighter check the fuse for it. Usually shared with the radio remote wire.

all these circuits share some common fuses, check fuse #6 ( 10 amp ), fuse # 11 ( 15 amp ) & fuse #12 ( 10 amp ) all in the inside fuse box at the left end of the dash.....good luck

antenna operation happens when radio is turned on,so I would look at the radio fuse first,other than that look for ant. fuse

there are actually amps located with the each rear speaker that are originally for the Bose speakers in the car.. its a little black box in the kit that holds the speakers in.. you can see them plainly from the trunk..

It is likely that these amps, or their fuses have shorted..

Check there..