Lost power to radio is there a fuse to check - 2005 Nissan Altima

You need to input the radio security code, when battery power is lost the radio goes into theft lock.

dead as in all functions and modes dead, all.
?
well it can only be 2 things
1: no 12vdc to head, (use a 10 buck voltmeter from walfart>?)
2: head end is dead.

25amps is the wrong, fuse. even 10 amps is good for 140watts.
the fuse is stated in the operators guide lost that?
some cars its mark,, RADIO.
the fuse that looks bad is
the fuse that looks good,can be , in fact. bad. what most techs
do is use ,yes, the voltmeter again, to measure bothsides of fues
keyon, radio on, to check all fuses related to radio (audio)
12v on both sides wins
if 12v makes it to the Radio and amp (if external amp then that too must have power, for sure) then the radio is bad, or amp.
if the radio scans and finds stations(not stated) then the amp might
be bad or lost power.

radio 101, over and out.

check fuse to radio
first.
or look for message (radio code)
if you lost the radio code (10000 post here on that topic)
then go to dealer and get t fixed.
or any pro lock smith , listed for car.

fuses that look bad are.
fuses that look good , can be , in FACT bad.
DMM, (flip to low ohms)
fuse reads 0 ohms, its good
fuse reads infinity its bad.
if fuse is good check for 12 at the radio power wire.
the radio must be ground do work, is it?
some radios have a separate ground wire (black) is it grounded?
post new radio make and model and can answer with 100% accuracy.
im a retire ET.
DC to daylight. experances.

sometimes its possible to insert the fuse outside the contacts, check fuses and make sure the go in the contacts properly.

radio has two fuses one for radio 7.5 amp and dome fuse to radio 15 amps check both fuses see what happens.

Battery power to radio lost when ignition off.

Radio must have one wire with battery voltage at all times to preserve memory feature..

Usually the YELLOW one, but not always.

Check all fuses. . Some have 2 or 3amp fuse in rear of radio.

check your fuses. after that i would pull the radio out and make sure all the connections are good. If still nothing check with a tester and make sure your constant and accesory power are working

the radio may run of the accessories fuse in the fuse box under the hood ,you may have a small fuse box under the dash check there ,some radios have line fuse in the power lead to the radio, you might have to pull the radio out to see but check all the other fuses first.....hope this helps.....cheers

it could be a fuse, & yes there might be a fuse behind the radio depending wat type of radio, but every radio i've seen has one in the back...but i myself wud check the wiring behind the radio cuz if its not getting no power then i think tht the power wire cud be hooked up wrong...check tht & get back to me.