How do you get the top down on 90 convertible

Question edited for clarity and to add maker.
Question moved to Category.

It is a known issue

Back Top Release Won't Work ' Cadillac Owners Forum

https://www.cadillacforums.com > threads > back-top-re...
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convertible top does not latch properly at the windshield header

https://www.cadillacforum.com > cadillac-allante-faq-65
May 4, 2017 - Cadillac Allante FAQ - convertible top does not latch properly at the windshield header - this affects the Phase II and III tops. the header strikers. as of ...
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1993 Cadillac Allante: cannot get the convertable top down or ...

https://www.justanswer.com > ... > Cadillac Repair
May 31, 2009 - Some owners may experience a condition where the folding top does not latch properly at the windshield header resulting in wind noise or water ...
1 answer · Top answer: There should be a manual override know that you can turn counterclockwise this should allow ...
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Manually Moving the Folding Top from the Down Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release the folding top cover latch using the emergency release cable.
Raise the folding top stowage cover.
Manually raise the folding top, holding the 5 bow up.
Manually lower and latch the folding top stowage cover.
Manually unfold the top and latch per normal procedure.

Manually Moving the Folding Top from the Up Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release header latch per normal operation.
Manually lift front of roof off of the header and raise the #5 bow at the same time.
Manually release the Folding Top Cover latch using the emergency release cable.
Fold the roof down into the well.
Manually close and latch the folding top stowage cover.

Power Folding Top System Components
The power folding top system consists of the following components:
• Folding top control (FTC) module
• Body control module (BCM)
• Folding top control switch
• Serial data communication
• Folding top cover latch actuator
• Folding top cover pull down actuator
• Folding top pump motor with valve manifold
• Position switches and limit switches:
- Pin receiver switch
- Luggage barrier switch
- Folding top cover open switch
- Top open switch
- Top closed switch
- 5 bow raised switch
- 5 bow lowered switch
• Tonneau release relay
• TONNEAU PULL DOWN ACTUATOR Fuse 20 A
• TONNEAU RELEASE Fuse 10 A
• BATT 2 Fuse 40 A
• REAR FOG/ALDL TOP SW Fuse 10 A
• Folding top mechanical components:
- Folding top
- Folding top cover
- Folding top valve 1
- Folding top valve 2
- Folding top valve 3
- Hydraulic lines and cylinders

Folding Top Cover Latch Actuator
The power folding top system includes a folding top cover that is powered open and close by a hydraulic system that is controlled by the FTC module. A power unlatch motor is used to unlatch the folding top cover before the folding top control (FTC) module powers the top cover open. The folding top cover unlatching is requested by the FTC module via class 2 message, but is executed by the body control module (BCM). When requested, the BCM applies battery voltage through the folding top cover release relay control circuit to the tonneau release relay. The relay is energized and battery voltage is applied through the folding top cover release control circuit to the latch actuator. The actuator is energized and the latch releases the folding top cover.

The electronics on this are very complex ,

System Operation
Before any movement of the power folding top is allowed, the folding top control (FTC) module must be aware of the following conditions:
• Unlatch the header. The FTC module reads the pin receiver switch is Inactive.
• The windows must be normalized. Refer to Power Window Reinitialization.
• The ignition must be placed in Accessory or RUN.
• The transmission must be placed in PARK, or with manual transmission, the park brake must be applied.
• Trunk status must not be ajar.
• The luggage barrier must be in place.
• The pump motor temperature must be within the operating range.

After the last cycle of power folding top operation, allow the hydraulic system a minimum of 4 minutes to bleed down before attempting manual operation of the top.
Your best bet take and have it checked for DTC'S - diagnostic trouble codes .
DTC B3666 Rear Tonneau Position Error
DTC B3667 Tonneau Release Circuit
DTC B1011
DTC B1291
DTC B1420
DTC B3602
DTC B3666
DTC B3667
DTC B3670
DTC B3971

I believe you do this in this order. Roll windows down, release the latch at the top of the windshield, raise the front of the top, release rear cover by pulling the latch near the rear seat, Pull up the back of the top and then pull up on the rear cover. The back of the top should now fit into the opening under the rear cover. Continue to fold the top into this space. Push down on the rear cover to lock (won't be able to open trunk if not engaged.) To raise it, release rear latch cover, open rear cover and pull top out of opening. Raise rear of top so you are able to now close the rear cover, set rear of top down on cover and then pull fron of top down and engage the fraont latch. Hoe that helps.

Sit in back seat passenger side. Remove panel which is on top which is below rear window, same panel where seat belt goes into panel at top. You will need to remove #2 Phillips screws which hold panel in place. Screws are hiding behind seat belt front cover where belt goes down in panel, under cup holder which allows arm rest cover to lift off and one more right on left side of head rest in corner. Remove panel. You will see switch which is in vertical position. If for any reason you want to by-pass switch, just unplug switch. Radio will still work in standard mode. The amp sound will not increase in performance when top is down and sound will not be as sharp.

If your top is electric then you will need to release the front cowl motors at the center point of the trim in front of the rear view mirror(small access plug needs to be removed and allen key inserted to drive unit.) You also need to pull the release handle under the back seat bottom(driver's side) The release handle detaches the drive units for the storage lid cover and the convertible top drive. Once the motors are released, the front of the top must be lifted approximately 6 inches and the pressure against the rear of the top will relax. raise the rear bow, open the storage lid, lower the rear bow and push the front of the top up and toward the back of the car. The top should fold into the storage area. Once in, close the storage lid until it clicks.

First thing to do is put the car in park and then set the parking brake. Next, release the drivers and passenger side handles (located at the top, above your head when you are sitting in the car, where the part of the top meets the windshield) Both handles are black and you simply pull the lever to release the hooks. After both hooks are released, push the button located near the speedometer (should be underneath the speedometer) on the dash and the top motor will engage and begain to retract the top. Hold the button untill the top disapears behing the back seat

Manual roof procedure
The procedure in the manual is just for closing the top.
A) Turn key to OFF for several seconds to bleed off hyd pressure.
B) Turn key to MAR (full electrical, but before start)
C) Remove cap on bulkhead behind the right-hand seat and use flat head screw driver to unfasten the hyd unit valve in order to relieve the oil pressure in the circuit.
D) Remove the cap on the bulkhead behind the left-hand seat and using screwdriver or allen wrench press until the top covering (panel behind roll bars that covers the convertible top well) until the panel's locks are released - you may have to tap the wrench to release the locks.
E) Lift the top covering manually and keep it open while extracting the top from its well.
F) Remove top from well until the front part is near the windshield frame.
G) Lift the rear part of top (rear window) upwards and lower the top covering until the hooks are resting on their respective locks.
H) While still keeping rear part of convertible top lifted upward press Button 1 to attach the top covering locks.
Button 1 is the forward one
Button 2 is the rear one.
I) Make sure locks are fastened. if not - try pushbutton 1 again. If necessary repeat D and H
J) Rest rear part of convertible top on top of covering.
K) At front of convertible top, open (deploy) the top's hooks by using allen wrench to turn the pin mechanism. (located in center of front headliner)
L) Press top unto windshield frame and use wrench to lock the hooks.
M) Press the rear of convertible top, so hooks on rear top insert into respective slots and press Button 2 to secure.
N) Keep Button 2 pressed until hooks properly fasten.

If the top is still tightly latched at the front, you can just start at step "G":
While holding the back of the top in the air, and the "top cover" resting down on its "hooks", press button 1 until it seats well.
Then lower the back of the top down to mate its "hooks" and press it down while holding button 2 until the top seats well.

This is for the ignition switch like you are asking for:

Ignition Switch REMOVAL & INSTALLATION Cirrus, Stratus, Sebring Convertible and Breeze CAUTION
The Supplemental Inflatable Restraint (SIR) system must be disarmed before working around the steering column. Failure to do so may cause accidental deployment of the air bags, resulting in unnecessary SIR system repairs and/or personal injury.

1. Disarm the air bag system, as described in Section 6.
2. Remove the left end instrument panel cover/fuse panel and remove the retaining screw holding the end of the instrument panel top cover.
3. Remove the instrument panel center bezel.
4. Remove the screws that secure the instrument panel top cover to the center of the instrument panel.
5. Lift the instrument panel top cover enough to gain access to the knee bolster attaching screws.
6. Remove the lower knee bolster attaching screws and knee bolster from the vehicle.
7. Remove the lower steering column cover attaching screws. Pull down on the lower cover to clear the ignition key cylinder and key release (if equipped).
8. Remove the lower steering column cover, sliding the cover forward while holding down the steering wheel tilt lever.
9. Tilt the steering wheel down to the fully lowered position and remove the upper steering column cover.
10. Remove the screws that hold the combination switch to the ignition lock housing.
11. Place the ignition lock cylinder in the RUN position.
12. Insert a small prying tool into the hole in the lower cover and depress the cylinder release tab.
13. Remove the ignition lock cylinder from the steering column.
14. Unfasten the electrical connectors from the switch.
15. Using a No. 10 Torx® bit, remove the ignition switch mounting screw.
16. Depress the retaining tabs and remove the switch. To install:
    
17. Place the ignition switch in the RUN position. Be sure the actuator shaft in the lock housing is also in the RUN position.
18. Install the switch, making sure the switch snaps over the retaining tabs.
19. Install the retaining screw.
20. Connect the wiring to the ignition switch.
21. Install the ignition lock cylinder.
22. Install the 2 combination switch mounting screws.
23. Install the lower and upper shrouds.
24. Install the knee bolster to the lower dashboard panel and tighten the lower knee bolster attaching screws.
25. Install the screws that secure the instrument panel top cover to the center of the instrument panel.
26. Install the instrument panel center bezel.
27. Install and tighten the screw holding the end of the instrument panel top cover. Install the left side instrument panel/fuse panel cover.

More coming.....

to lower the top,

insert the trunk key into the key hole just to the left of the driver's seat and turn it 1/4 turn.

push in the red handle stabilizer and then pull down on the handle near where your head would be when driving

repeat for the passenger's side

lift up on the front most part of the convertible top and push slightly towards the rear.

holding that in place with one hand, pull back and then up on the backmost part of the convertible top leaving it inverted on top of the rest of the cover, or at least, up out of the way of the cover door.

once that part is up, you can let the front part go back forward

pull the cover door release lever near the keyhole mentioned in step one.. there are two latches one for the back seat to fold down, and one for the cover.

lift the cover door up and fold the back part of the convertible top back down to its original position

lift up again on the front most part of the convertible top and push it back, this time it should go back fairly easily and start to lower the back part of your top into the compartment. as you do this bit, it will be helpful to keep the rear window from buckling too much so as to avoid deformation.

when it is about 2/3 of the way in, you will want to push upward on second support bar from the back in the convertible top, if you dont, it will buckle up and not allow the top to fit in, and if you force it you will break your top.

once it is all in, you can shut the cover door and remove your key.

to put it up,

put the key in the aforementioned key-hole and turn it 1/4 turn as before.

pull the compartment latch and lift up on the compartment door.

pull the top all the way up so that the front of the top is resting on the windshield.

pull up the back part of the top so you can shut the compartment door

(seems obvious, but just for completeness sake) shut the compartment door

lift up on the front-most part of the top and push it slightly back to give your self slack to push the back part down and into place.

pay attention to both sides as you push the back of the convertible top into the groove on the top of the compartment door. (in it's shut position)

once it is in place, guide the plastic ridges on each side of the convertible top into the grooves on the sides of the compartment door.

from inside, pull the handles down so that the hooks on the bottoms are extended.

put each hook into its respective hole, and push the handle/lever into the closed position so that the red handle sabilizers snap into place.

the end.

remove the plastic trim cover inside at the front where the latch secures to the top of the front screen, then remove the 2 small plugs in the rear interior trims behind rear seats on side panels. Using the special allen key tool turn the catches approx 90 degrees to release the rear of the hood, then simply lift off and back