2. Check the alternator belt for proper tension. If the belt is loose, tighten it according to the manufacturer's specifications.
3. Check the voltage regulator for proper operation. The voltage regulator is responsible for regulating the voltage output of the alternator. If the voltage regulator is not working properly, it can cause the dash lights to flicker and the gas gauge to not work.
4. Check the wiring harness for any loose or damaged connections. If you find any loose or damaged connections, repair them.
5. Check the ground connections for the electrical system. Ensure the ground connections are clean and tight.
6. Have the battery and alternator tested at an auto parts store. If either the battery or alternator is faulty, it can cause the dash lights to flicker and the gas gauge to not work.
