Because the power for your headlights is pulled from your battery. When the dashboard lights dim after turning on the headlights the dashboard lights aren't getting as much power as they were with the headlights off. With the motor running or off? The headlights draw a lot of current, but should not visibly affect other systems. There could be a problem with a worn out battery, an alternator that isn't charging correctly, or you have a bad earth between the battery and the chassis. Check the large cable connection between the battery (usually negative these days) and the bodywork, or between the engine block and the bodywork.
Try "rocking" back and forth while turning ignition key
Its the bushings on your suspension, It will cost $200 dollars to replace at a shop.
Remove the spark plug wire from your 2001 Mercury Grand Marquis. Remove the spark plug with a 5/8 deep well socket, white turning it to the left. Reverse the process to put in the new spark plug.
Bad/shorted battery? (doesn't not hold a charge)
Could be one of the door sensors causing this.
Process of elimination.
Remove the spark plug wires from your 2002 Mercury Grand Marquis spark plugs. Remove the spark plugs by turning them to the left with a deep well 5/8 socket. Reverse the process to install the new spark plugs.
Remove negative battery cable. Turn on headlights. Wait 15 minutes. Turn off headlights. Replace negative battery cable. Better, go to Autozone, ask them to plug in their OBDII analyzer and hit "Clear". that way you do not clear the corrections the computer has added to the system and will have to relearn if you remove the battery cable. just remove the negative battery cable,wait 5 min,and put it back on,, computer will reprogram all by itself. Pre 1995 vehicles disconnect battery for 10 Minutes minimum Whats with turning on headlights with the battery cable removed? They will not work anyway
Sounds like the charging system failed and the car ran until battery power was deleted.
If you vehicle is front-wheel drive, more than likely, that grinding crunching sound when you turn is coming from the CV joints.
yes, but you will lose turning radius, rubbing and bottoming out. strongly recomend 2 or 3 inch lift
The alternator may not be charging. There may be a bad connection from the battery positive or negative to the vehicle circuits. The headlights large current draw is causing the voltage to drop below what the computer needs to operate properly
The headlights on a 96 Chevy Silverado are adjusted by turning the screws on the top and side of the headlights. It allows the lights to be adjusted for optimal night vision.
try turning it off then removing the battery then putting the battery back in the turning it on. it worked on mine
The range of the headlights on a Vauxhall Tigra may be adjusted by turning the adjuster wheel. It is located on the dashboard of the vehicle.
Turning on the headlights with the engine turned of.
It may be out of battery.
The turning radius of a Mercury Villager may depend on the year in which it was made. The turning radius is 38.7 feet for vehicles made during the 1993-1998 period.
If it isn't turning over then it may be a problem with your starter motor. If it is turning over but not starting then it could be a range of things. Fuel pump would be one thing to check. If you turn on headlights and they are very dim then it could be that your battery is very flat (but enough charge to still run the dash lights as they are a much lower power rating then headlights etc)
There are three headlight settings on your headlight switch. You can turn the low beam headlights on by turning the headlight switch.
Weak alternator. Have the charging system checked. I had a 95 Toyota tercel that totally shut down when the headlights turned on and the cause was for the most part dirty battery connections, when the electrical load was raised the alternator could not immediately keep up and required a moment to adjust, but with a bad battery connection (probably the Positive in my case) it couldn't temporarily draw enough power from the battery to still fire the spark plugs hence the immediate stall.