Removing
1. We prepare the car for operations (see "Vehicle preparation for maintenance and repair").
2. Disconnect the wire from the negative battery terminal (see "Battery - removal and installation").
3. Remove the steering column shaft covers (see "Steering shaft casings - removal and installation").
4. Disconnect the wiring harness block from the switch contacts (castle) ignition.
5. Insert the key into the ignition. Move the key to position "0" and slightly turn the steering wheel to the right and left in order to unlock the steering shaft.
6. Using a Phillips screwdriver, unscrew the two screws securing the lock to the steering shaft bracket.
7. Using a screwdriver or other suitable tool, push the lock retainer through the side hole in the bracket and remove the lock from the hole in the bracket.
Examination
You will need a multimeter to do the job.
To check the contact group alternately (in accordance with the table. 13.4) we connect the ohmmeter probes to the ignition switch terminals and check the switching of contacts at various key positions. In a serviceable contact group, the resistance should tend to zero. If the resistance is greater than zero, then the contacts are dirty or burnt.
Table 13.4. Switch contact switching (castle) ignition
Key position in the ignition lock | Live contacts | Switched circuits |
0 | 30 and 30/1 | - |
I | 30-INT | Exterior lighting, windshield wipers and washer |
30/1-15 | Generator excitation winding, ignition system, carburetor pneumatic valve control system, power supply and control system (for injection engine), direction indicators, control devices, heater, heated rear window, reversing lights | |
II | 30-INT | See position I |
30/1-15 | See position I | |
30-50 | Starter | |
III | 30-INT | See position I |
Replacing the contact group
1. Prying with a screwdriver, remove the retaining ring from the groove in the lock body.
2. We remove the contact group from the lock body.
Assembly
1. We install the contact group of the lock, aligning the wide protrusion A on the contact group with the wide groove B on the lock body and at the same time we align the groove C at the end of the axis of the contact group with the end protrusion G of the lock axis.
2. Install the removed parts in reverse order.