Because power from the battery, which was going to the lights, is being utilised to turn the starter motor. You should really start the car before you turn on your lights to avoid putting unnecessary strain on the battery
Start by checking the grounds. There's a loose connection in there somewhere.
Not enough power to starter, jump it and then ensure alternator is good. Also check battery condition.
stater or silanoid
Since the dashboard lights are flickering, it sounds like a possible wiring problem. Check all of the main wires from the battery to start with, then check the fuse box for any loose wiring.
Increased Engine load = more amperage
It's common on most Ford's for the light switch to burn out on most models. The newer vehicles have been fixed but that's where you could start.
If the batteryu & starter are good, I would check the neutral safety switch
If the warning lights come on when you start the car, but then go back off, there is no reason for alarm. However, if the lights stay on, or come on when you are driving you should probably stop driving as soon as you can and take the car to the mechanic.
You start your engine, it kicks on sometimes gives a little trouble.. While driving at night if you notice your headlights flicker on and off along with your electrical lights in your dash and maybe stereo equipment. Coming to a stop, then trying to take off and applying gas it will sputter and maybe stall on you.. Usually means your distributor is going out.
Your owner's manual will list possible problems that such a signal can indicate. In addition be sure you did not accidentally turn the hazard lights on.
get fuel for it
Are the lights in the dash coming on, and it just won't crank or are there no lights at all? If the lights are coming on you need an ignition switch.