The wood grain on my radio knobs has fallen off and I cannot find it (the tunning knob never had a wood grain cover). I cannot find just the covers, but I can get NOS knobs. So how do you get the radio knobs off, without braking the radio? Also the only knobs I've been able to find are for the late '70's and early '80's radios, with the knobs on the left and right side, as opposed to them both being on the left side. Will those knobs work for an 89 radio (I know the wood grain won't match)?

http://www.carradiorepairs.com/index.htm

Try calling these guys, they might have what you need.

In my experience, to get the knobs off you just need to be brave and pull them off. The radio in your '89 is not the same as in my '86, so be careful to try other options first, but if it is like that car and every other car I've done stereo work to (around a dozen), you should just have to pull them off. Usually the knob will pull straight off with moderate pulling and sometimes there will be a spring behind the knob (if you have this you don't want to lose it as it stabilizes the knob and usually serves the function of bouncing back the knob when it is depressed to do something like check the time when the car is off). The knobs on the stock radio from my '95 Fleetwood also just pull off, as did the knobs on my old '83 Coupe Deville (RIP). I do believe my sister's '94 Sedan Deville and my friend's '97 Deville are the same as well. The radio is tough, so don't be afraid to pull, but obviously don't break it, either. I think I recall someone once telling me about screw-on knobs, so that might be an option as well, though I have no experience with anything like that.

Thank you. They came right off with no problem. There are no springs, and they just snap back into place.

Also the only knobs I've been able to find are for the late '70's and early '80's radios, with the knobs on the left and right side, as opposed to them both being on the left side. Will those knobs work for an 89 radio (I know the wood grain won't match)?

No. Knobs from an earlier radio are not, in any way, compatible with the radio used in the Brougham. However, with absolutely no reason to my madness, for 6 hours, I made the old knobs fit on my radio. I think it looks better.

http://www.cadillacforums.com/forums/picture.php?albumid=375&pictureid=4951

As opposed to

http://www.cadillacforums.com/forums/picture.php?albumid=375&pictureid=4950

If anyone wants to follow me, there are a lot of alterations you have to make to the earlier knobs. The knobs come in two parts; a backing plate which engages the speaker select switch (chooses right/ left/front/rear speakers) and a woodgrain knob end (changes volume/ tunes stations). The earlier knobs have a metal back plate, which is supposed to engage the speaker select switch, that was too deep to fit on my radio. Also the hole in the middle isn't big enough to fit over the switch. To make them engage the speaker select switch I had to mount the chrome plated plastic back of my knobs to the back of the earlier knobs.

The plastic backing plate won't fit inside the metal one. I had to cut the plastic one to a point where it fit inside the metal one without any of it sticking out above the top. When you cut it, you have to make sure that you do not distort the shape of the middle "tunnel" or mess up the groove in it, because that engages the select switch.

Next you have to take a center punch and make deep indentations in the dish side of the metal baking plate. Take the plastic baking plate and line the center groove up with the selection indicator on the metal one. Put a nail into the the plastic plate, so that it will line up with the indentation in the metal plate. After the nail is in, cut it to be level with the top of the metal plate. The nail keeps both plates moving together, so that you can select your speaker of choice. Finally, glue the the plastic and metal plates together, using 3M trim adhesive, and install on the radio.

The the mounting holes in the woodgrain knob ends are also too large to fit the radio. The is a easy modification; just stuff a little bit of paper in the holes to give them traction against the volume/tuner controls.

The knobs work perfectly in all aspects except one (two). The knobs will not push in to view the time(current station setting)/ switch from AM to FM. I still have to try the springs that came with them, but if that doesn't work I'll add more paper wadding to the holes.