Radio i tried connecting a after market radio to a 97 expedition. but no sound or light came on any ideas what could be wrong?

need to wire the power wire for the amplifier to the remote wire on the aftermarket radio usually a blue wire on the after market radio

Sounds like you have a poor connection at battery.

you have misunderstood ,the brake and indicator lights work on one unit unlike europe which is seperate ,so you have a problem with the side lights whch have a feed to the radio for the panel lights ,also the side lights use the same bulb as the stop lights 12v 21watt and 6 watt and somehow the wiring is faulty and i suspect that the radio is connected wrongly using the feed from the lights instead of a different feed ,had this a few times with becker and grundig radios in europeon mercs and BMWs ,rev counter and speedo dont work among other things ,cause a weekend mechanic fitting a after market radio

Trade the bulbs with each other, and see if the problem transfers. The bulb could have a bad connection.

check fuses, are you checking red wire with key on

Either a burnt bulb, or a fuse. The check engine light has nothing to do with the radio.

1997 Ford Windstar Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Green/Violet
Car Radio Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Light Brown/White
Left Rear Speaker Negative Wire (-): Light Brown/Yellow
Right Rear Speaker Positive Wire (+): Light Brown/Green
Right Rear Speaker Negative Wire (-): Brown/Pink

96 and 97 are the same

Likely bad ground. Also check battery voltage when headlights are on. Most stereos shuts off when battery level drops bellow certain value

Check the in dash lights to see if they are burnt out or you have a bad connection or bad wire. this could be do to having an after market sound system.I had similar problems with a 97 Plymouth Breeze i.e. loose connection.