How do I enter the radio code for 1993 volvo 850

We just unlocked a 98 Volvo S-70 radio,on the front,you have 2 slots across from each other,use you finger nails or a dime to get it to come out,then you can pull it out,then get the serial number and write it down,then put stereo back in,then get your vin number,it's on your insurance card,then call dealer and ask for your radio code,they will ask for vin number and radio serial code,if your radio says code,then you can enter it,ifit says off,then it's locked,you have 3 tries till it locks and it says off,if it says off,then you turn key to number 1,turn radio on,wait 2 hours,then it will say code,then enter code and radio will unlock,our code is 5513 if you want to see if it will work for you.Here's a link to you owners manual,read about the radio code,same as our's,but the dealer will give it to you free. 1994 Volvo 850 Watch this video. How To Find Volvo Radio Code 850 960 S70 C70 etc

Turn ignition key to number 1 position. Turn radio on, and wait for readout in radio display to say code. This could take several hours, so make sure the car is in a safe place. When code appears, key in correct code (if you don't have it, get it from a Volvo dealer, you will need the vin # and proof that you own the car).

pudh the 2 tabs in on eather side of the radio pull ,Call the dealer give them the radio part number .you got the code .

Apparently you do not have a CD changer connected to your radio and that is why you get an error when you press the CD button. However sometimes it's an error code and means that you need to reenter the code for the radio. Is there a place to put in a CD? If so, here's a link to some info on your radio and entering your code.

http://www.volvo-forums.com/t16110-cd-changer-error-code.htm

Good luck!

rds radio fitted to a 2002 Volvo fh12 volvo p/n 20467840 model 09387819

There is a 4 digit security code that needs to be entered into the radio. Look in your owners manual, it may be written in the book or there may be a card in the booklet that has the code. If you find it, enter it once, if it doesn't work, stop, because entering the wrong code will lock up the radio. You will need to go to the dealer to get the code if you cannot find it.
http://repairpal.com/volvo-850-1994/common_problems

I'd be taking the dash apart looking for burnt wires in a harness, so you will likely have to take the outer cover off some of the bundles. Start tracing back from the plug in for the radio. Hope this helps.

With a good battery in the car turn the ignition key to Position I. Do not put the key in position II. Make sure "OFF" is displayed. Let the car sit with the key in position I for about two hours. "CODE" will appear in the display. Enter your code.

well, I don't know, the dealer has all of that info, but if your lucky you can pull the old radio and maybe a previous owner or mechanic was thoughtful enough to write the code on top. Locate the two springloaded tabs on the left and right sides of the face, push them in gently with a knife or flat screwdriver and use them to pull the radio out. Good luck. 

remove radio by pushing in the two side tabs to alow you to remove.  Call your local volvo dealer (parts dept.) with the serial # and part # off the radio.  Type in the code and volia.