Sanyo Car stereo fm doesnt work

An internal fuse could be open.

Part of the circuit is a stereo multiplexer decoder, that decodes the fm stereo signal, I guess that is what you mean when you talk about capacitor linked to the fm band.

I do not have the sbchematics for this circuit, if you are good at electonics just grab the tester and check the whole circuit. On a radio is not difficult to find a blown capacitor.

Test also the stereo/mono switch.

Are you sure you are listening to a stereo program (e.g. FM radio or CD/Tape)? Have you tried adjusting the fade and balance controls? If sound is not coming out of all speakers, you will probably have to replace the radio.

Your stereo came with a piece of wire attached at the back. This is/was the FM aerial. It should be roughly 1 metre or approx 38" long. There is no socket on the back of this stereo to attach an external FM aerial. So if the wire broke off then you're going to have to either attach some new wire to the stub, or open the set up and solder directly to the circuit board.

The exact cable lengths for an FM antenna to pick up 88-108 MHz is 37.66" long.

all else works perfect car drives runs, head lamps not dead or dim?
just radio, check the radio fuse
and post all modes of radio ,, AM/FM,CD/AUX,USB , all dead?

the operator guide in the glove box , covers time set.
all radios do that.
and if not normal, the antenna is broken or fell off the rear of radio.

if got static switch to FM ,
many AM stations, broadcase to am and fm same content.
so use FM. its static free. (by design) but does fade sooner.
you can in fact hear AM station 12,000 miles away it night
called super stations, 50,000 watt stations. ive done this many time.

did you try another car, in same spot , and same station?
are you in under ground parking?

Maybe an FM amplified indoor antenna could help you to get a stable FM signal.

Close, but not EXACTLY a modl lnumber or how it's connected. What output to what input? Is the proper source selected? Does it work withg its onboard FM. Clues, please.

At the main menu press settings
press FM Transmitter
Turn transmitter on by pressing off. Will change to On
Press the Frequency button. Than change the frequency to one that doesnt have a radio station.
All sounds from the GPS will now be transmitted to the frequency set. Make sure your FM radio is set to the same frequency.

With my one vehicle this option does not work very well & is full of static because my radio entenna is at the rear of the car. The GPS only transmits a couple of feet.

You might have to invest in a proper ariel not the kind you get that you stick on the wall but a proper FM one that sits in your loft on on your roof. Hope this helps.