Almost every time you have malfunctioning/acting up lights or instruments, its often caused by poor contacts.
Go to radio shack buy:And have junior climb under the dash and clean/spray the connections. Should solve the problem.DESC: DeoxIT contact cleaner is a fast-acting deoxidizing solution that cleans, preserves, lubricates, and improves conductivity on all metal connectors and contacts. Use as a general treatment for connectors, contacts, and other metal surfaces, and on non-critical metal surfaces with severe oxidation and corrosion. If the metal surface is discolored, it is severe. DeoxIT dissolves the contamination and protects the surface.