I am replacing my key ignition switch which controls my power to my dash and other electrical components. I am not sure exactly how to remove this to do so. Can I get some good directions on this. My truck is a 99 Chevrolet silverado z71 with the 5.3L

Disconnect the battery: Before beginning any work on the electrical system of your vehicle, disconnect the battery to prevent accidental shocks or short circuits.
Remove the steering column cover: The ignition switch is located on the steering column, so you'll need to remove the cover to access it. Depending on the exact model and trim level of your Montero Sport, the cover may be held in place with screws or clips.
Remove the ignition switch: Once you have access to the ignition switch, you'll need to remove it from the steering column. This may involve removing any retaining screws or clips that are holding it in place, as well as disconnecting any electrical connectors.
Install the new ignition switch: Install the new ignition switch in the reverse order of the previous steps, making sure that it is securely fastened to the steering column and that all electrical connections are properly connected.
Test the new ignition switch: Once the new ignition switch is installed, reconnect the battery and test the switch to make sure that it is working properly. Insert the new key and try to start the engine. If the engine starts and the key can be turned smoothly, you've successfully replaced the ignition switch.
It's worth noting that depending on the specific make and model of your Montero Sport, the exact steps for replacing the ignition switch may vary slightly

It is likely that the switch you are referring to is the ignition switch, which is responsible for turning the electrical system on and off when the key is inserted and turned. The ignition switch is an important component of the Peugeot 406's electrical system, as it allows the vehicle to start and provides power to the electrical components when the engine is running.
If the ignition switch is not functioning properly, it can cause a variety of issues with the vehicle's electrical system, including problems with starting the engine, powering the dashboard lights and other electrical components, and controlling the fuel pump. It is important to have a functioning ignition switch in order to operate the vehicle safely and reliably.
If you are experiencing issues with the ignition switch or other components of the electrical system in your Peugeot 406, it is recommended to have the vehicle inspected and diagnosed by a professional mechanic. They will be able to identify any problems and determine the necessary repairs.

How to Replace the Ignition in a Toyota Truck

The two primary components in a Toyota truck's ignition system are the actual ignition switch and the lock cylinder, which work with the ignition key. On most current models of the Tundra and Sequoia, you won't need to completely disassemble the entire steering panel to access the switch and cylinder. Keep in mind that the exact procedure can vary depending on the year and model of your Toyota truck.

Instructions

1. • 1 Disconnect the truck battery's negative cable by loosening the cable's clamp nut and detaching the cable from the battery post. Set the cable aside somewhere where it can't accidentally touch the battery terminal.
     
   • 2 Remove the under-dash panel on the left side of the truck by removing its four retaining screws and pulling it off. Detach the hood release cable by lifting the lever, removing the screws and disengaging the cable from the lever handle.
     

3.

Remove the air duct that is below the steering column to access the ignition switch. Unplug the electrical connectors at the rear of the switch, remove the mounting screws with a screwdriver and detach the switch from the lock cylinder housing.

4 Detach the illumination ring by pulling out the plastic pin on the side. Turn the lock cylinder into the Accessory position with the key and insert a small screwdriver into the hole at the bottom of the ignition switch casting. Press the release bottom with this screwdriver as you pull the lock cylinder straight out.

5 Insert the replacement lock cylinder with its own key into the ignition switch casing. Make sure you insert it so the cylinder is in the Accessory position. Replace the illumination ring with its pin.

6 Mount the replacement ignition switch on the housing with its mounting screws and connect it to the electrical connectors.

7 Re-install all other components--the air duct, under-dash panel and battery cable--in the reverse order of removal.

Read more: http://www.ehow.com/how_5916602_replace-ignition-toyota-truck.html#ixzz31Nptu1ew

Some cars have inline fuses in the battery cables and have multiple connections for components making one get power and others not. If all your fuses are good, the next thing to look at is the electrical part of the key switch. Usually there is the mechanical part with the tumbler, and the electrical part.

Ignition Switch/Lock Cylinder REMOVAL AND INSTALLATION CAUTION
Some models covered by this manual may be equipped with a Supplemental Restraint System (SRS), which uses an air bag. Whenever working near any of the SRS components, such as the impact sensors, the air bag module, steering column and instrument panel, disable the SRS, as described in Section 6. The ignition lock is an integral component of the steering lock mechanism. If the ignition lock must be replaced, perform the following procedure. Fig. 1: Exploded view of the ignition switch/lock cylinder assembly
Fig. 2: Remove the break-off head retaining bolts by chiseling a slot in the bolt, then removing them with a screwdriver
Millenia

1. Disconnect the negative battery cable.
2. Properly disarm the air bag system.
3. Remove the rear console box, brake boot and center panel (disconnect the harness connectors).
4. Remove the rear console.
5. Remove the undercover, glove compartment and compartment cover.
6. Remove the upper and lower steering column covers.
7. Tilt the steering shaft down. Remove the cap and panel light control switch. Remove the meter hood mounting screws. Pull the meter hood forward to disengage the clips.
8. Remove the instrument cluster,
9. Remove the drivers side air bag and the steering wheel.
10. Remove the combination switch.
11. Remove the passenger side air bag mounting bolts, electrical connector and remove the air bag module.
12. Remove the hood panel release lever. Pull the side panel forward to disengage the clips, remove the side panel.
13. Remove the side covers.
14. Remove the dashboard mounting bolts, pull the dashboard up and forward and remove.
15. Remove the steering shaft.
16. Remove the screw and the ignition switch and disconnect the ignition switch connector.
17. Using a chisel and a hammer make a groove in the heads of the steering lock mounting bolts. Remove the bolts and the steering lock assembly. To install:
    
18. Install the steering lock mechanism to the steering column jacket. Make sure that the lock operates correctly. Install new mounting bolts and tighten the bolts till the heads break off.
19. Reconnect the ignition switch connector to the ignition switch and install the ignition switch to the steering lock mechanism with the screw.
20. Replace the dashboard close to its mounts and connect all harness connectors. Install all mounting bolts. Torque to 14-18 ft. lbs. (19-25 Nm).
21. Install the side covers.
22. Instal the side panels.
23. Install the steering shaft and torque the mounting bolts to 12-16 ft. lbs. (16-22 Nm).
24. Connect the passenger side air bag module electrical connector and replace the module to the dash and install the mounting bolts.
25. Install the combination switch on the steering column.
26. Install the steering wheel and drivers side air bag module.
27. Install the instrument cluster.
28. Install the meter hood.
29. Install the upper and lower steering column covers.
30. Install the glove compartment cover, compartment and the undercover.
31. Install the rear console, bracket, center panel, brake lever boot and the rear console box.
32. Reconnect the negative battery cable,
33. Place the steering column securely on a workbench. Use a chisel and hammer to make slots in the head of the lock screws. Remove the screws.

Except Millenia

1. Disconnect the negative battery cable.
2. If equipped, disarm and remove the air bag.
3. Remove the steering wheel and the combination switch.
4. Remove the steering column by performing the following:
   1. Remove the driver's side under dash covers.
   2. If equipped, disconnect the key interlock cable from the steering column.
   3. Detach any remaining electrical wire harness connectors from the column.
   4. Remove the upper column-to-dash mounting bolts. Support the steering column.
   5. Remove the intermediate shaft-to-steering column shaft coupling bolt and remove the steering column-to-firewall bracket bolts/nuts.
   6. Remove the steering column from the vehicle.
5. Place the steering column securely on a workbench. Use a chisel and hammer to make slots in the head of the lock screws. Remove the screws.
6. Remove the ignition lock assembly. To install:
   
7. Position the ignition lock and bracket on the steering column.
8. Install the new screws until the head twists off. Make sure the lock operates properly while tightening the new locking screws.
9. The remainder of the installation is the reverse of the removal procedure.

The ignition lock assembly contains two components: a lock cylinder to deter theft and an electrical portion that supplies power to electrical components such as the radio, electric windows, and windshield wipers. The electrical portion of the ignition switch also provides power to the starter motor to start the engine.
The ignition lock is an anti-theft device that prevents a vehicle from being driven unless the ignition key is in the ignition switch. If the ignition key is not in the ignition switch, it 's impossible to turn the steering wheel.
To replace the ignition switch cylinder lock, the trim panels around the steering wheel are removed. Then the tamper-proof hardware that attaches the ignition lock assembly to the steering column is removed. The ignition lock assembly is removed from the steering column, and the lock cylinder is replaced. The new ignition lock is reattached to the steering column, and the trim panels are replaced.make sure you dissconect battery first the 1997 had a recall on the ignition switch dont no if the 1995 had a recall if so they will replace for free

Have no clue as to what you want ? Like to try an explain a little better . What do DTC'S 740 , 785 and 1860 have to do with key in ignition chimes . Plus i'am assuming the DTC'S you have listed all start with P - P0740 , P0785 and P1860 .
DTC P0740 TCC Enable Solenoid Circuit Electrical (2.2L)
DTC P0740 TCC Enable Solenoid Circuit Electrical (4.3L)
DTC P0785 3-2 Shift Solenoid Circuit Electrical (2.2L)
DTC P0785 3-2 Shift Solenoid Circuit Electrical (4.3L)
DTC P1860 TCC PWM Solenoid Circuit Electrical (2.2L)
DTC P1860 TCC PWM Solenoid Circuit Electrical (4.3L)

None of these have anything to do with warning chimes .

Key-In Warning Buzzer
Voltage is supplied at all times to the truck BCM through the following components:
• The underhood bussed electrical center (UBEC) fuse 4
• CKT 1140 (ORN)
The chime or buzzer sounds if the following conditions exist:
• The key is in the ignition switch
• The vehicle is not running.
• The left door is open.
When the door is open, the LF door jamb switch closes to ground. This provides a ground to the truck BCM through the following components:
• CKT 126 (TAN)
• The left front side door jamb switch
• CKT 1050 (BLK)
• SP203
• C203, cavity F12
• G203
The chime or the buzzer will sound for as long as the door is open and the key is in the ignition switch.


Turn the ignition switch to the OFF position.
Remove the key from the ignition.
Using the scan tool, enter BCM Data List.
Select Input 1.
Does the KEY IN IGNITION test display NO?
3
Turn the ignition switch to the OFF position.
Remove the key from the ignition.
Using the scan tool, enter BCM Data List.
Select Input 1.
Does the KEY IN IGNITION test display NO?
--
Go to Step 4
Go to Step 8
4
Turn the ignition switch to the OFF position.
Remove the key from the ignition.
Move the headlamp switch to the OFF position.
Using the scan tool, enter BCM Data List.
Select Input 2.
Does the PARKLAMPS test display OFF?
--
Go to Step 5
Go to Step 9
5
Inspect the connections at the BCM.
Are the connections in need of repair?
--
Go to Step 6
Go to Step 7
6
Repair the connections as necessary.
Is the repair complete?
--
Go to Diagnostic System Check - Audible Warnings
--
7
Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
Is the repair complete?
--
Go to Diagnostic System Check - Audible Warnings
--
8
Locate and repair the short to ground in CKT 80 between the BCM connector C2 terminal B9 and the key in ignition alarm switch.
Is the repair complete?
--
Go to Diagnostic System Check - Audible Warnings
--
9
Are the park lamps ON with the switch OFF?
--
Go to Exterior Lights System Check in Lighting Systems
Go to Step 5
Your best bet take to a qualified repair shop

If your Ford Focus is not starting, and you know the battery and alternator are good, the problem could lie in the ignition system. The ignition switch is a whole cylinder inserted into the steering column that connects to the starter motor. When you change an ignition switch, you are also replacing the key.

1. Remove the dashboard panel below the steering column in your car; it should be screwed in place. Remove the steering column's upper cover by releasing its clips with a flat-head screwdriver.
   
2. Look for the audio control switch---a small device sticking out of the steering column that acts like a remote control. If one exists, release the switch's plastic locking tang with the screwdriver, and unplug the electrical connector to remove the switch.
   
3. Loosen the steering column by releasing the locking lever, and remove the steering column's lower cover by pulling out the screws with the screwdriver.
   
4. Use your ignition key to turn the switch to the left---the position that would activate the accessories but not start the car. Insert the screwdriver into the hole in the top of the cylinder to depress the detent spring, and pull out the cylinder with the key inside.
   
5. Insert the new key into the new ignition switch, and line up the switch inside the steering column so it's in the same place the old switch was in when you removed it. Make sure the detent locks into place; then turn the switch so it's in the "Off" position.
   
6. Replace all the covers and panels you removed to access the cylinder, along with the audio control switch, if applicable, in reverse order of
   

Things You'll Need:

• Small flat-head screwdriver
• Ignition switch and key

Tips & Warnings

• Older Ford Focus models may have a different method of removing and changing the ignition switch. Check an automotive guide for your particular year and model.
• Always disconnect the negative (black) battery cable before working on the ignition or any other electrical component of your car.

I hope helped with this (remember rated this help) Good luck.

Service Information
Oldsmobile Bravada | Blazer, Bravada, Jimmy, S10 Pickup, Sonoma (VIN S/T)
Service Manual | HVAC | HVAC Systems - Manual | Repair Instructions | Document
ID: 305815

Instrument Panel Carrier Replacement
Removal Procedure
On vehicles equipped with a manual transmission, remove the shift lever.
On vehicles equipped with an automatic transmission, perform the following
steps:
2.1. Apply the park brake.
2.2. Insert the ignition key and turn the ignition switch to the RUN
position.
2.3. Depress the brake pedal and shift the transmission to the 1
position.
2.4. Turn the ignition switch to the OFF position.



Caution: Unless directed otherwise, the ignition and start switch must be in
the OFF or LOCK position, and all electrical loads must be OFF before
servicing any electrical component. Disconnect the negative battery cable to
prevent an electrical spark should a tool or equipment come in contact with an
exposed electrical terminal. Failure to follow these precautions may result in
personal injury and/or damage to the vehicle or its components.
For Vehicles equipped with OnStar® (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar®
functionality in the event of a main vehicle battery power disruption to the
VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the
OnStar® fuse with the ignition key in any position other than OFF. Retained
accessory power (RAP) should be allowed to time out or be disabled (simply
opening the driver door should disable RAP) before disconnecting power.
Disconnecting power to the OnStar® module in any way while the ignition is On
or with RAP activated may cause activation of the OnStar® Back-Up Battery
(BUB) system and will discharge and permanently damage the back-up battery.
Once the Back-Up Battery is activated it will stay on until it has completely
discharged. The BUB is not rechargeable and once activated the BUB must be
replaced.
Disconnect the battery negative cable.
Remove the left sound insulator. Refer to Instrument Panel Insulator Panel
Replacement - Left Side .
Remove the right instrument panel sound insulator. Refer to Instrument Panel
Insulator Panel Replacement - Right Side .
If the vehicle is equipped with a multiple CD changer located in the center
console, remove the center console. Refer to Front Floor Console Replacement .
Remove the center sound insulator. Refer to Closeout/Insulator Panel
Replacement - Center .
Remove the lower left instrument panel mounting bolt.
Remove and retain the instrument panel storage compartment. Refer to
Instrument Panel Compartment Door Replacement .
Remove the lower right instrument panel mounting bolt.


Remove and retain the left and right speakers and the speaker grilles. Refer
to Radio Front Speaker Replacement in Entertainment.
Use a flat-bladed tool in order to remove the windshield defroster grille.
Retain the grille and sunload sensor for use on the next IP carrier.


If equipped with a sun load temperature sensor, twist the sensor ¼ turn
counterclockwise in order to disengage.
Disconnect the brown electrical connection from the body control module (BCM).
Disconnect the purple electrical connection from the body control module
(BCM).
Remove the knee bolster. Refer to Knee Bolster Replacement .
Remove and retain the instrument cluster. Refer to Instrument Cluster
Replacement .
Remove and retain the radio. Refer to Radio Replacement in Entertainment.
Remove the HVAC control assembly. Refer to the appropriate procedure:
• Control Assembly Replacement in Heating and Ventilation (Non-A/C)
• Control Assembly Replacement in HVAC Systems with A/C - Manual
• Control Assembly Replacement in HVAC Systems with A/C - Automatic
Caution: This vehicle is equipped with a Supplemental Inflatable Restraint
(SIR) System. Failure to follow the correct procedure could cause the
following conditions:
• Air bag deployment
• Personal injury
• Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:
• Refer to SIR Component Views in order to determine if you are
performing service on or near the SIR components or the SIR wiring.
• If you are performing service on or near the SIR components or the
SIR wiring, disable the SIR system. Refer to Disabling the SIR System.
Disable the passenger side SIR system. Refer to Disabling the SIR System in
SIR.


Remove the left and right instrument panel driver knee bolster brackets.
Lower the steering column for clearance. Refer to Steering Column Replacement
in Steering Wheel and Column.


Important: Label all of the connections in order to avoid improper
installation.
Remove the top instrument panel screws.
Roll the instrument panel down.
Disconnect the electrical connections, as needed.
Remove the fastener that retains the radio antenna cable to the instrument
panel.
Remove the instrument panel from the vehicle.
If replacing the instrument panel carrier, retain the parts for assembly of
the new instrument panel carrier.

REMOVAL: 

NOTE: The Supplemental Inflatable Restraint (SIR) system must be disarmed before removing any components in the area of the air bag system. Failure to do so may cause accidental deployment of the air bag, resulting in unnecessary SIR system repairs and/or personal injury. 

Disconnect and isolate the negative battery cable from the battery. 
Allow the SIR system capacitor to discharge for at least 2 minutes, before performing any removal procedures. The air bag system is now disabled. 

Remove the key cylinder (ignition lock). 
Using a No. 10 Torx® tamper proof bit, remove the ignition switch mounting screw. Depress the ignition switch retaining tab and carefully pry the ignition switch from the steering column. 
Disconnect the electrical connectors from the ignition switch and remove the switch from the vehicle. 
INSTALLATION: 
Be sure the ignition switch is in the RUN position and the actuator shaft in the ignition lock housing is in the RUN position. 
Reconnect the electrical connectors to the ignition switch. 
Carefully install the ignition switch, making sure the ignition switch snaps over the retaining tabs. 
Install and tighten the ignition switch mounting screw. 
Install the key cylinder (ignition lock). Complete the installation by reversing the removal procedures. 
Reconnect the negative battery cable. 
Check switch operation. 

Good Luck and hope this helps