i believe that would be your fuel pump it comes on when you turn the key to acc so you have adequite pressure when you start
edit. it could be your air compressor for suspension.. mine comes on when i turn my key. runs for a minute and cuts off
According to my Chilton's Auto Repair Manual : For a ( 1970 ) Lincoln Continental , 460 cubic inch V8 engine The ignition timing is set at ( 10 * Before Top Dead Center )
Answerapply the parking brake before turning the ignition/starting the motor. OK, so how do you reengage it?
Try turning the steering wheel hard before and while turning the key.
Something you might try is turning the steering wheel slightly before turning the key. The locking mechanism that keeps the wheel from turning if the ignition is off sometimes puts pressure on the cylinder so that the key won't turn, and pulling the wheel to one direction or the other may help relieve that pressure.
the tumblers in your key switch are failing replace them before long
The parts inside the ignition can be corroding. Solution Spray some WD-40 in there if that doesn't work you may need a new ignition. Keys can wear down and cause this problem, you may want to try a new key before replacing the ignition switch.
I would have the ignition itself replaced. These go out all the time and will leave you stranded. Get a new ignition keyed to your current key and you won't have to do programming. A locksmith can do this for you. Do it soon though before it stops turning.
According to my Chilton's Auto Repair manual : For the 460 cubic inch V8 engine in a 1970 Lincoln Continental : ( the ignition timing is 10 * Before Top Dead Center ) Also : The spark plugs are gapped at .034 inch The point dwell is 26 to 31 degrees The point gap is .017 inch
check the battery conections they might be loose or even the starter conections if that doesn't work charge your battery first before trying again
Vehicles with the ignition switch on the column, you must first pull the steering wheel off, move the turn signal mechanism out of the way and then you can get to the clip or pin holding the ignition switch in place. / before you replace it make sure it is not just the tension of the steering against the lock that keeps it from turning move the wheell back and forth briskly while applying turning motion to key
You either need to turn the steering wheel before turning the key or the ignition cylinder is bad and you need a new one. EDIT: When you pull out the key to a del sol you can continue to turn the wheel which will lock the steering wheel and the ignition , if you get into the car and can't turn the key , (iN YOUR CASE) try turning the steering wheel and the key at the same time , this will unlock the wheel and the ignition.
Try turning the steering wheel until it locks before you try it, though I'm not sure this will work.