Why does my Speedometer not work radio not working gas gauge does not work Help

Hello, first solve your battery problem. Is the battery fully charged and able to handle loads? If not, resolve this by charging and verifying you have a good battery, or replacing it with a known good battery. Secondly, check your charging and electrical system. With a good battery in place, you can effectively check the alternator and voltage regulator for proper function. Once establishing all that is good, if the problem remains, you can go ahead and test the different components -- first - check fuses and circuit protection.