Blown radio fuse and cant find the blown fuse. no fuse scematic

fuses need to be tested, if the LOOK good, they can be bad
turn key on
all fuses, 12vdc on both side,s this is 100% ACCURATE WAY to test in a live circuit.

cars come with up to radio options and 1000s more after market.
if stock
alldata.com has this page. radio schematic.

your fuse is blown,
hair line cracks are impossilbe to see, unless 10years old.or?
Xray man. ( Xmen?)_
learn to use a voltmeter and save tons of time and hair pulls.

with radio on, key on, only 2 wire read, 12v,
memory
power
if the power wire is dead the fuse is blown.
newer cars use the standard
http://knowledge.sonicelectronix.com/car-audio-and-video/accessories-and-installation/wiring-harness-color-standards/

red wire aftermarket
oem use what they feel.
buy the radio adaptor at walfart, and see pin that has power
or alldata.com,log in read
ever google?????

first hit. GRAY


http://www.installdr.com/harnesses/toyota-wiring.asp

Ok, so judging by what you wrote, there were 7 or so "burnt" looking or damaged wires in the connector behind the radio. These wires are usually color coded with all kinds of strange colors with either white or yellow lines running through some of them...I've looked around and can't find any diagrams yet...I'll keep looking ...In the meantime, go check the fuses to see if any are blown in the car. It's not usual that messing with the stereo would cause the locks not to work. let me know what you find.

ITEM - WIRE COLOR - POLARITY - WIRE LOCATION
12V - red - POSITIVE - ignition harness
STARTER - white - POSITIVE - ignition harness
IGNITION - red - POSITIVE - ignition harness
ACCESSORY - red - POSITIVE - ignition harness
SECOND ACCESSORY - yellow - POSITIVE - ignition harness
BRAKE WIRE - white - POSITIVE - brake pedal switch
RADIO 12V - red - POSITIVE - radio
RADIO GROUND - black - NEGATIVE - radio
RADIO SWITCH - yellow - POSITIVE - radio
RADIO ILLUMINATE - pink - POSITIVE - radio
POWER ANTENNA - gray/orange - POSITIVE - radio
LF SPEAKER - white - brown - radio
RF SPEAKER - green - orange - radio
LR SPEAKER - yellow - black - radio
RR SPEAKER - orange - blue - radio

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Radio 12v blue/yellow + radio harness
Radio Ground brown - radio harness
Radio Ignition gray + radio harness
Radio Illumination green + radio harness
Factory Amp Turn-on N/A
Power Antenna N/A
LF Speaker +/- pink - purple +,- radio harness or amplifier
RF Speaker +/- lt. green - blue +,- radio harness or amplifier
LR Speaker +/- black - yellow +,- radio harness or amplifier
RR Speaker +/- red - white +,- radio harness or amplifier

Notes: If equipped, the amplifier is on the passenger side rear cabin wall.

Not for sure if I can help.Someone forgot the golden rule.NEVER CUT THE WIRING HARNESS.I dont have the wiring scematics in front of me but the older models had RED for power,BLACK for ground,and the wiring going to the spreakers should be an off color running together going to the speakers.Probably has a six speaker system.Hope I helped.

did u know that they make a harness for your car that plugs into your factory harness and then adapts to your aftermarket radio? for the lights, you have blown the interior light fuse, it may be the same fuse as the cigar lighter.Below is your radio wire colors and what they do.
1990 Toyota Corolla Car Stereo Radio Wiring Diagram.
Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Purple
Right Front Speaker Wire (-): Light Green
Rear Speakers Size: 4′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White
-->

Battery WHITE/YELLOW (+) RADIO HARNESS
Accesory WHITE/RED (+) RADIO HARNESS
Ground BLACK (-) RADIO HARNESS
Illumination RED/BLACK (+) RADIO HARNESS
Dimmer RED (-) RADIO HARNESS
Power Antenna YELLOW/WHITE (+) RADIO HARNESS
Amp Turn On YELLOW/WHITE (+) RADIO HARNESS
LF Speaker (+) WHITE
LF Speaker (-) ORANGE
RF Speaker (+) YELLOW
RF Speaker (-) BROWN
LR Speaker (+) RED
LR Speaker (-) GREEN
RR Speaker (+) BLUE
RR Speaker (-) BLACK

Red - Power
Yellow - primary power must be joined to the red
blue - Remote
Black - ground or negative
To find your speaker wires check the color of the cord behind each speaker than match it with the same color in the dash.
or the easy way is to use a normal 1.5v penlight battery and try each speaker cord behind the dash and listen to which speaker give off a crackling noise so you can get the balance on the cd player right.
If u trying to find power in the car and don't have a tester than get a 12v light or bulb join the negative to the body and push the positive wire into each one of the holes in the factory plug in the dash one at a time until the light comes on. That is your positive the rest is easy. (DIY guru)

Can purchased an adapter kit at Best Buy or Circuit City that is color cordinated with the factory wires for about 12.00. This will go right into the factory plug.

Radio 12v orange + radio harness
Radio Ground black - radio harness
Radio Ignition dk. green + radio harness
Radio Illumination gray (dimmer) + radio harness
Factory Amp Turn-on N/A
Power Antenna N/A
LF Speaker +/- tan - gray +,- radio harness
RF Speaker +/- lt. green - dk. green +,- radio harness
LR Speaker +/- brown - yellow +,- radio harness
RR Speaker +/- dk. blue - lt. blue +,- radio harness
Immobilizer Bypass Module: Required: Yes Type: Passlock 2 Part #: 457G, 555L, or 555T
Notes: The Passlock 2 wire colors are yellow, orange/black, and red/white (not used).

SEE ALSO IF YOU CAN GET HELP AT LINK BELOW
http://www.2carpros.com/makes/ford/f150.htm