98 Grand Marquis - no headlights. I've replaced the LCM with a 'Cardone' refurb and installed a new light switch. All lights EXCEPT HEADLIGHTS work. What now?
I don't know what testing you have done? There are four fuses and a circuit breaker that supply voltage to lcm. Use a test light and check voltage on those circuits. Some are hot all the time, some go hot with the key on. The ground for lcm is black, check that also.
If you bought the Cardone "Band-Aid" and not the whole LCM unit. It may not fix it. HTH. -Jim
As a followup. Took the car to a reputable shop and the trouble was neither the light switch nor the LCM but a faulty Multi Function Column Controller. Headlights work fine now.
Looking for a Used Grand Marquis in your area?
CarGurus has 2 nationwide Grand Marquis listings and the tools to find you a great deal.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts
Related Models For Sale