What kind of speaker? Some of them have a re-set button, some require being completely disconnected from your power source. (Surge protector or wall outlet -- whatever it is receiving its power from.) Then wait about 15 seconds.
And as usual, check your cables. One might be being crimped by something sitting on it, or your cat or rabbit, (if you have one,) might have chewed it up.
Simplest method is to remove the speaker from your system altogether, find a different power socket somewhere else in the building. If still no power light, get new speakers.
Battery GREEN/YELLOW (+) RADIO HARNESS Accesory YELLOW/BLACK (+) RADIO HARNESS Ground BLACK/LIGHT GREEN (-) RADIO HARNESS Illumination LIGHT BLUE/RED (+) RADIO HARNESS Dimmer BLUE/RED (+) RADIO HARNESS Power Antenna AMP=BLUE LF Speaker (+) ORANGE/LIGHT GREEN LF Speaker (-) LIGHT BLUE/WHITE RF Speaker (+) WHITE/LIGHT GREEN RF Speaker (-) DARK GREEN/ORANGE LR Speaker (+) GRAY/LIGHT BLUE LR Speaker (-) TAN/YELLOW RR Speaker (+) BROWN/PINK RR Speaker (-) ORANGE/RED
The green light on a mini speaker typically indicates that the speaker is powered on and connected to a device via Bluetooth. It may also signify that the battery is charged or that the speaker is in a ready state for audio playback. If the speaker connects to a device, the light often stays green; if it disconnects, it may change to another color, like flashing blue or red. Always refer to the specific speaker's manual for exact indicators.
Constant 12V+ Wire: Light Green Ignition Switched 12V+ Wire: Black/Yellow Ground Wire: Black Illumination Wire: Blue/Yellow Dimmer Wire: N/A Left Front Speaker Wire (+): Green Left Front Speaker Wire (-): Blue/Red Right Front Speaker Wire (+): Light Green/Yellow Right Front Speaker Wire (-): Black/Green Left Rear Speaker Wire (+): Green/Yellow Left Rear Speaker Wire (-): Blue/Orange Right Rear Speaker Wire (+): Green/White Right Rear Speaker Wire (-): Green/Blue
In a 1991 Ford Explorer, the car radio battery constant 12v+ wire is light green/yellow, the radio accessory switched 12v+ wire is yellow/black, the ground wire is red or black, the illumination wire is orange/black, the dimmer wire is light blue/red, and the amp trigger wire is blue. For the front speakers, the left front speaker wire (+) is orange/light green, the left front speaker wire (-) is light blue/white, the right front speaker wire (+) white/light green,and the right front speaker wire (-) is pink/light green. For the rear speakers, the left rear speaker wire (+) is pink/light green, the left rear speaker wire (-) is tan/yellow, the right rear speaker wire (+) is orange/red, and the right rear speaker wire (-) is black/white.
In a 2002 Ford Lynx, the radio constant 12v+ wire is black/orange, the ignition switched 12v+ wire is yellow/black, the ground wire is black/light green, the illumination wire is light green, and the amp trigger wire is dark blue. For the front speakers, the left front speaker wire (+) is orange/light green, the left front speaker wire (-) is light blue/white, the right front speaker wire (+) is white/green, and the right front speaker wire (-) is green/orange. For the rear speakers, the left rear speaker wire (+) is gray/light blue, the left rear speaker wire (-) is tan/yellow, the right rear speaker wire (+) is orange/red, and the right rear speaker wire (-) is brown/pink.
In a 2008 Mazda Tribute, the radio battery constant 12v+ wire is orange/light green, the accessory switched 12v+ wire is yellow/black, the ground wire is black, the illumination wire is light blue/red, and the amp trigger wire is light blue. For the front speakers, the left front speaker wire (+) is orange/light green, the left front speaker wire (-) is light blue/white, the right front speaker wire (+) is white/light green, and the right front speaker wire (-) is green/orange. For the rear speakers, the left rear speaker wire (+) is gray/blue, the left rear speaker wire (-) is brown/yellow, the right rear speaker wire (+) is black/violet, and the right rear speaker wire (-) is orange/violet.
left front is light gray(-) and tan (+) right front is light green (-) and dark green (+)
The stereo wiring color codes for a 1997 Hyundai Elantra are simple to identify. The radio constant 12v+ wire is light green, the radio ignition switched 12v+ wire is brown, the ground wire is black, the stereo illumination wire is dark green/white, and the dimmer wire is dark green/black. For the front speakers, the left front speaker wire (+) is green/red, the left front speaker wire (-) is light green/white, the right front speaker wire (+) is red/blue, and the right front speaker wire (-) is light green/black. For the rear speakers, the left rear speaker wire (+) is yellow/white, the left rear speaker wire (+) is yellow/blue, the right rear speaker wire (+) is green, and the right rear speaker wire (-) is green/blue.
Accesory DARK GREEN (+) RADIO HARNESS Ground BLACK (-) RADIO HARNESS Illumination GRAY (+) RADIO HARNESS Dimmer VIOLET/WHITE (-) RADIO HARNESS LF Speaker (+) TAN LF Speaker (-) GRAY RF Speaker (+) LIGHT GREEN RF Speaker (-) DARK GREEN LR Speaker (+) BROWN LR Speaker (-) YELLOW RR Speaker (+) DARK BLUE RR Speaker (-) LIGHT BLUE Steering Cntrls YES Speed Cntrl YES Radio Security YES
The radio wiring colors for a 2003 Ford F-150 XLT are simple to follow and identify. The car radio battery constant 12V+ wire is light green/pink, the car radio accessory switched 12V+ wire is black/violet, the car radio ground wire is black/green, the car radio illumination wire is light blue/red, and the car stereo antenna trigger is blue. For the front speakers, the left front speaker wire (+) is gray/light blue, the left front speaker wire (-) is tan/yellow, the right front speaker wire (+) is white/light green, and the right front speaker wire (-) is dark green/orange. For the rear speakers, the left rear speaker wire (+) is orange/light green, the left rear speaker wire (-) is light blue/white, the right rear speaker wire (+) is orange/red, and the right rear speaker wire (-) is brown/pink.
I cut the stock plug from the 97 sportage and wired an aftermarket stereo with this and it worked great. The wires are a little short but it can be done. Constant 12V+ Wire: Light Green Ignition Switched 12V+ Wire: Black/Yellow Ground Wire: Black Illumination Wire: Blue/Yellow Dimmer Wire: N/A Left Front Speaker Wire (+): Green Left Front Speaker Wire (-): Blue/Red Right Front Speaker Wire (+): Light Green/Yellow Right Front Speaker Wire (-): Black/Green Left Rear Speaker Wire (+): Green/Yellow Left Rear Speaker Wire (-): Blue/Orange Right Rear Speaker Wire (+): Green/White Right Rear Speaker Wire (-): Green/Blue
Radio Constant 12V+ Wire: Light Green/Purple Radio Switched 12V+ Wire: Yellow/Black Radio Ground Wire: Black Radio Illumination Wire: Red/Black Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: N/A Radio Amp Trigger Wire: N/A Front Speakers Size: N/A Front Speakers Location: N/A Left Front Speaker Wire (+): Orange/Light Green Left Front Speaker Wire (-): Light Blue/White Right Front Speaker Wire (+): White/Light Green Right Front Speaker Wire (-): Green/Orange Rear Speakers Size: N/A Rear Speakers Location: N/A Left Rear Speaker Wire (+): Tan/Yellow Left Rear Speaker Wire (-): Gray/Light Blue Right Rear Speaker Wire (+): Orange/Red Right Rear Speaker Wire (-): Brown/Pink