My dims work part of the time on 2003 crown vic, brights work

If you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your headlights and or tail lights don\'t work, Ford just finally extended the warranty on your LCM (Lighting Control Module) for free - both parts and labor and will install a new one for free! Ford has extended the warranty to 15yrs/250,000. Must be done at Ford and the fix is free. Have your Vin # ready and call your local Ford Dealer and tell them you need to make an appointment because your headlights don\'t work and Ford has extended your warranty on the LCM. Tell them it is the Customer Satisfaction Program 14N01. If they act like they don't know what you are talking about ask to talk to the manager or tell them to call Ford Motor Company and ask them or you can call Ford yourself. We just had ours done on 8-12-14 in Scottsdale, AZ. If you have a 99 you better get there before Oct. 14th, 2014 as it is a 15 year warranty.

Try Autozone or similar and ask if they show a fusible link for the lights. Not sure if there are separate for low and high beam. Sometimes fusible links are under battery case and get crushed.