Your head light switch is going bad soon lights wont come on at all. Common problem cheap repair.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
I was looking at the 1996 Mercury Grand Marquis Owner Guide and it shows that you can change each of the ( 4 light bulbs for the 2 low beam and the 2 high beam headlights ) ( the low beam headlights take bulb # 9006 ) ( the high beam headlights take bulb # 9005 )
can the fuel injectors on a 1994 grand marquis be checked without removing them from the engine, if so what type of instrument do i use
where you turn on the headlights ... push the button
If your headlights work, but your tail lights don't, your bulbs could be blown. It is possible that you have a shortage in your car.
Turn on headlights/parking lights and adjust dimmer control
Have the high pressure valve checked.
If Its an older Grand Marquis its easy. Find the knob that you pull out to turn on the headlights. Now, just turn it clockwise and the light will turn off!
only the headlights are suppose to flash on a headlight flasher
You have to take the headlights out. To do this, you have to remove the clips on the headlight under the hood. Once removed they are two adjustment screws that you can adjust. It's trial and error.
There's no coin called a "marquis" dime. If you're thinking of a MERCURY dime, please see the Related Question.
you need to replace the the keypad on the door....the membrain has cracked and is letting moisture in.....if you leave the headlights on auto you will find they will go on and off too