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?

Asked by olderndirt Aug 16, 2017 at 01:16 PM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

This is the classic Ford "Panther" platform problem.  I'm beyond the 15 year
recall limit.

2 Answers
27,530

oilyspill answered 7 years ago

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.

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olderndirt answered 7 years ago

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.

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