1997 ford taurus ignition problem

Sounds like the ignition switch is broken. It is further down the steering column on the bottom side. The key switch pushes a piece of plastic to pull or push on the switch. Sometimes it is the this piece that brakes.

Easiest fix it it is the plastic actuator rod is to buy a used steering column and replace everything. You will have to get it re keyed to match you original set. Or if you already got your new key switch re keyed use that.

These pics are from a 1997 column but they are very similar to the 1995.

Usually a sign the tumblers in the lock cylinder have worn out or jammed.
You may have to get the lock cylinder drilled out and replaced.

Inspect/Test/Replace The ignition switch is usually mounted to the steering column and is operated by a linkage rod.
NOTE On column-mounted ignition switches, don't confuse the switch with the lock cylinder and keys. The ignition switch is not normally visible. On some vehicles, the steering column support has to be removed and the column lowered to find the ignition switch. On others, the switch is accessible under the dash.
The ignition switch is operated by the key switch. Courtesy of Ford Motor Company. To replace the switch:

• Remove the ignition switch wiring harness.
• Unbolt it from its position.
• Bolt the new switch into position.
• Attach the witing harness.

Do you mean the key and tumbler, or the switch down on the bottom of the steering column? If you mean the switch, just lower your steering column by removing the cover at the bottom of the dash, and then remove the 2 bolts on either side of the column. The switch is near the base of the column, and the rod that runs from the ignition switch goes into it.
If you mean the key and tumbler, you have to pull the steering wheel, remove the screws from the signal cam, and then remove the locking bolt that holds the tumbler. You will need a steering wheel puller to remove the snap ring, and to reinstall.

You can't do it; the Theft System it's integrated to the vehicle control computer ECU/PCM; you need install one INTERFACE to make this work.

Review this Wiring Diagram and this comment: when installing a 791 TRANSPONDER BYPASS System on this vehicle it will be necessary to remove the BOTTOM STEERING COLUMN Cover and IGNITION SWITCH TUMBLER to gan access to the Factory Transponder System around the Ignition Switch. To do so will require that you first look at the bottom of the STEERING COLUMN COVER to identify the screw holes from the IGNITION SWITCH TUMBLER RELEASE PIN HOLE, that is required to remove the Ignition Switch Tumbler, the IGNITION SWITCH RELEASE PIN HOLE is the SMALLEST Hole in the plastic cover in this picture. NOTE *** to remove the IGNITION SWITCH TUMBLER, a TORX #15 Bit on a Screw Driver will work just fine. Incert it up into this hole and press, at the same time, turning the IGNITION SWITCH ON and the Tumbler will pull out at the same time. This Must be done to remove the IGNITION SWITCH TUMBLER so that the BOTTOM Steering Column Cover can be removed to gain access to the TRANSPONDER SYSTEM built around the IGNITION SWITCH.

Also, its possible that you need other details from the Taurus's Owners Manual.

Hope helps.

if the key turns fully as it suppose to the electrical ignition switch is at fault

pull the steering wheel and remove the loc plate with a tool and look for the screw that holds ignition cyl in the housing remove it and pull the key switch out! however if it's (THE) ignition switch under the column? take the bottow cover plate off under the dash sround the column tube and remove the mount bolts and lower the column you will need a 5/16 wrench to unbolt the (ACTUAL) switch which soo many!! people confuse with the ignition key ! (TUMBLER) assmbly in the top of the column

most likely its the ignition cylnder (tumbler)

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

the ignition switch is located under the dash at the bottom of the steering column.suspect a fault in the linkage connecting tumbler to switch.

Are you aware? you have the key and tumbler and another part under the dash on the steering column called the ingition switch.
They both have to be aligned in sync to operate properly.
Question? is this a tilt steering wheel,if it is and you dont know anything about it I suggest you get a professionel to do this kind of job.
You really have to know what your doing for this one.