first it was my interior overhead individual lights that went out. then my running lights and tag lights went out. running lights would work for a while during daylite hours but not at night.

Asked by Jun 01, 2015 at 01:43 PM about the 2004 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

headlights work fine on both auto and on.  the running lights now are completely out.  
Started with sometimes working sometimes not.  The interior overhead individual lights
have been out for a year or so.  hope someone can help

1 Answer

3,425

Hello, This sounds like the switch itself...in the Merc/Vic/TC's, the feed wires at the switch are known for getting hot, and not making a good connection TO THE SWITCH in dashboard. To inspect, its very obvious, The one connector with all wires will be discolored if any of the connections have been other than perfect. Ford makes the entire end harness for the lamp switch available, or sometimes you can put a new terminal on the wire IF its long enough, and make the repair... Hope this Helps, AskTrannyMan

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