The shape of the contact points inside the headlight switch is inappropriate, and therefore, it may occur that the contact points wear prematurely and that grease reaches them through abrasion powder and works as an insulator for electrical currents. The headlights may occasionally fail as a result of this, and if the problem is left unattended, the contact points may heat up due to increased current resistance and the plastic parts may melt, which could cause the headlights to fail.
