2. Check the wiring. If the fuse is not blown, then the next thing to check is the wiring. Make sure that all of the wires are connected properly and that there are no loose connections.
3. Check the clock and radio. If the fuse and wiring are both good, then the next thing to check is the clock and radio themselves. Make sure that they are both turned on and that the volume is turned up.
4. Clean the contacts. If the clock and radio are still not working, then you may need to clean the contacts. The contacts are located on the back of the clock and radio. You can clean them with a cotton swab and some rubbing alcohol.
5. Replace the clock and radio. If none of the above steps work, then you may need to replace the clock and radio. You can purchase a new clock and radio from a car parts store or online.