It is impossible to list in detail how to do this in the space available here. Purchase a repair manual to guide you in this repair.
The signal flasher on a 1990 Oldsmobile Delta 88 Royale is typically located under the dashboard, near the steering column. It can usually be found in the fuse panel area or mounted directly on the steering column itself. To access it, you may need to remove a panel or reach behind the dashboard. Always consult the vehicle's service manual for specific details and diagrams.
Steering column
How to remove and replace a steering column on a 95 Cadillac Sedan Deville?
when do you know when you have a bad steering column
how to change steering column on 86 pontiac bonneville
Along the right side on the steering column.
under the steering column above the brake pedal
To replace the ignition switch on a 1989 Oldsmobile Cutlass Calais, first disconnect the negative battery cable to avoid electrical issues. Remove the steering column cover by unscrewing the screws, then locate the ignition switch attached to the steering column. Disconnect the wiring harness from the old switch and remove it by unscrewing the mounting screws. Install the new ignition switch by reversing the steps, ensuring everything is securely reconnected before reassembling the steering column cover and reconnecting the battery.
You have to replace the entire steering column. It is not loose, the lock is broken on your column height adjuster.
On my 1998 the button is on top of the steering column. Try looking there.
To the left of the steering column under the dash.
Of course...