2005 headlights will not turn on
Not sure what you are referring to as the shut of valve. Headlights not turning on is electrical in nature. With the headlight switch itself is faulty, or the wiring. There are 2 separate fuses that control the headlights, one left and right, here is a diagram....http://www.crownvic.net/drock96marquis/images/fuses/05 -06cvgmqINTfuses.jpg
Here's a diagram for the fuse bock in the engine compartment for info.....http://www.crownvic.net/drock96marquis/images/fuses/05- 06cvgmqENGfuses.jpg
Did the headlights just stop working, or we're you doing some work to the vehicle?
There is a Automatic Headlight Control Relay in the system. Not sure if it has anything to do with this.
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