First the left half went dim, then the other side lost illumination. Radio functions, but you only know what station you are on due to the presets. Are the displays available as a replacement part from anywhere?
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Idid see a service bulletin concerning radio. sound and display lost after engine crank. turn key off, then back to accessory position, radio functions work. the fix is to reprogram radio with new software. I also saw several codes listed for radio, they were manufacturer specific codes. did you check for codes?
I'm not sure what model Toyota you have, but in a Camry, the cause is most likely a blown fuse. This is a 10A fuse labelled "Gauges" located behind a cover in the dash panel
Constant 12V+ Black/Yellow Switched 12V+ Red/White Ground Black/Light Blue Illumination Orange Dimmer Pink Antenna Trigger Orange/Red Antenna Right Rear Front Speakers 4" Doors Left Front (+) Dark Green Left Front (-) Brown/Red Right Front (+) Purple Right Front (-) Dark Blue/Red Rear Speakers 6" x 9" Rear Deck Left Rear (+) Brown/Yellow Left Rear (-) Brown/Light Blue Right Rear (+) Dark Blue/White Right Rear (-) Dark Blue/Orange
2002 Pontiac Grand Am Car Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power. Car Radio Ground Wire: Black/White Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Brown Car Stereo Antenna Trigger Wire: N/A Car Stereo Amp Trigger Wire: Pink Car Stereo Amplifier Location: Mounted behind trim in the left side of the trunk. Car Audio Front Speakers Size: N/A Car Audio Front Speakers Location: N/A Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Car Audio Rear Speakers Size: N/A Car Audio Rear Speakers Location: N/A Left Rear Speaker Positive Wire (+): Brown Left Rear Speaker Negative Wire (-): Yellow Right Rear Speaker Positive Wire (+): Dark Blue Right Rear Speaker Negative Wire (-): Light Blue -->
black = ground dark green = lights on input grey = panel lights pink = on input yellow = power input orange = battery power input
nca = shield ground tan = left fr spkr + orange/black = left & right spkr -neg lite green = right fr spkr +
nca = shield ground dark blue = right rear spkr + dark green/yellow = right & left spkr - neg brown = left rear spkr +
purple/white = display dim output pink = vehicle speed input ----------------------------------------------------------------------- **** 91 park ave without delco bose =
purple/white = display dim output pink = vehicle speed input
grey = left front - neg tan = left front + pos dark green = right front - neg light green = right front + pos
black = ground dark green = display dim signal grey = panel lights pink = power antanna yellow = ign input orange = battery power light blue = right rear - neg dark blue = right rear + pos yellow = left rear - neg brown = left rear + pos .
I also own a 2004 Pontiac Vibe and our company delivery vehicle is a 2006 Vibe, both have this problem. I had a friend who repairs circuit boards re-solder new bulbs. You need to know what you are doing, the heat from the gun can burn out the new bulbs.
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