Unplug unit.
Open casing.
Look for loose wiring connector, otherwise:
Temporarily swap left and right speakers.
Plug in and play a continuous recorded tone of about 50Hz-440Hz.
Play with maximum volume to get a decent voltage reading.
If LEFT CH now works then L speaker is faulty.
If RIGHT CH now works then L amplifier is faulty.
Electrical test (needs a meter with Volts and Resistance).
With speaker still connected test audio (AC V) signal on working right speaker terminals.
Now check left Channel at amplifier board if possible, and at speaker terminals.
If no V unplug speaker wires if possible at board then test across board L+ and L- output pins.
Still nothing means amp is faulty.
Test continuity of speaker wires end-to-end. Each wire should be 0 ohms or close to zero. The continuity buzzer function can also be used for this.
With amplifier off and unplugged, remove speaker-connector from board or cut live speaker wire or unplug lug at speaker, whichever is easier. With one wire apart from the amplifier, test the loudspeaker ohms.
Should be in the range of about 4-8 ohms.
Most speakers have the rating screen-printed on the voice-coil magnet housing.
If ohms reading is way too low, say 0-1 ohm it has a short and is damaged.
If ohms reading is way too high, say several Meg-ohms, it has a coil break and is damaged.
Carefully join/tape any cut wires if applicable, renew speaker if faulty with same size and rating, re-test then re-assemble.
Testimonial: "Thank you!Happy NEW YEAR!Daniel NY"
SOURCE: Replace 2005 Nissan altima stereo receiver
Try radio shack, or stereo sales/installation place for ready to go plug adapter. For a few bucks, it saves headaches, and butchering the wiring in case you want to re-install old one later when trading in or selling the car.
SOURCE: Radio wiring problem 2001 Audi A3
Hi, had total issues with this too! Your back speakers arent going because they are amped by the factory amp in the boot. You have to provide power to the amp so that it will turn the rear speakers on. This was a white and black striped wire in my car (Audi A3 1997) The rear speakers are blue /green and brown/red (left rear) , and the LH rear is brown/red and (forgotten colour) but the wire on the bottom left under those two brown/red wires on the 20pin harness. If you wire it all up like this then your rears should be going :)
Testimonial: "So sorry for the very long delay in replying to your advice. It was the sub/amp in the boot as you correctly guessed. Another £200! Many thanks Pal"
SOURCE: my saturn vue radio does not work. CD player works
it probably in the radio it self .some of have 2 fuses check them.better check all fuses. good luck
SOURCE: 2004 mini cooper radio/cd player not working
Just a suggestion but does a cd player have a sound card.
SOURCE: radio/cd player stopped working after battery replaced
Whenever you completely disconnect a battery from a car (newer car) all the computers shut down, and everything becomes discombobulated...after you drive it a little bit, they kick back in eventually...just takes a little time. (and patience)
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