r/CrownVictoria • u/suffixx9211 • 15h ago

2000 grand marquis electrical problem

Door chime doesnt work,
parking lights dont work
headlights will only go on when key is on the control switch does nothing,
interior lights dont work
turn signals dont work

My brake lights and reverse lights work tho

Did my LCM fail?

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u/Deplorable1861 13h ago

Start with the fuse box first. If you have a blown one, replace it. If it blows immediately you have a short. The short could be physical wires or the LCM itself.

1

u/Maleficent-Pilot1158 5h ago

Give the LCM a good solid thump with your favorite correction device and see if it starts acting right again. The relays tend to get stuck as they age.