Opel Omega

since 1993-1999 release

Repair and operation of the car

Opel Omega
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Repair of engines
+ 4. Heating system and ventilation
+ 5. Fuel, exhaust systems
+ 6. System of start of the engine
+ 7. System of ignition
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, half shafts
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
- 14. Body electric equipment
   14.1. Technical characteristics
   14.2. Search of a source of malfunction in system of electric equipment
   14.3. Safety locks and relay
   14.4. Switches
   14.5. Bulbs (external lighting fixtures)
   14.6. Bulbs (internal lighting)
   14.7. External lighting fixtures
   14.8. Adjustment of headlights of head light
   14.9. Instrument guard
   14:10. Elements of an instrument guard
   14:11. Hours / multipurpose display
   14:12. Lighter
   14:13. System of adjustment of xenon headlights
   14:14. Horns of a sound signal
   14:15. Levers of screen wipers
   14:16. Engine, connecting mechanism of a screen wiper of a windshield
   14:17. Engine of a screen wiper of back glass
   14:18. Washers of wind glass / back glass / headlights of head light
   14:19. Radio receiver / cassette / CD player
   14:20. Loudspeakers
   14:21. Radio antenna
   14:22. System of the anticreeping alarm system and immobilizer of the engine
   14:23. System of airbags of safety
   14:24. Elements of system of airbags of safety
   14:25. System elements cruise control
   + 14:26. Schemes of electric equipment


14.3. Safety locks and relay



Safety locks serve in order that break off a chain when current reaches a certain value to protect elements and wires which can be damaged by too strong current. Sharp increase in current is usually caused by malfunction in a chain, most often short circuit (see subsection 14.2).

The most part of safety locks is located in the block of safety locks on the left side of the dashboard, additional safety locks are located in the block of safety locks and the relay on the right side of a motive compartment.

On later models one or three additional a safety lock of big power can be established in a motive compartment, near the accumulator. On models at which near the accumulator one safety lock is located it protects electric chains of anti-blocking system of brakes. If three safety locks, then two safety locks located closer to the accumulator are established protect a chain of system of charging, and the third safety lock located further from the accumulator protects electric chains of anti-blocking system of brakes.

For receiving access to the block of safety locks to dashboards open a cover.

For receiving access to the safety locks located in the block of safety locks in a motive compartment just uncover.

Designations of the chains protected by safety locks are specified on a cover of the block of safety locks.

Before removal of a safety lock switch off the corresponding chain (or ignition), then get a safety lock from contacts. In a safety lock the wire has to be visible; if the safety lock fused, the wire will be torn or melted.

Always use safety locks of the required power. Never use a safety lock of other power and do not replace it with something another. Do not replace a safety lock more than once, without having eliminated a malfunction source. Power of a safety lock is specified from above a safety lock; pay attention that safety locks have various colors for identification simplification.

If the safety lock fuses right after replacement, do not replace it again, yet do not establish and do not remove a cause of defect. In most cases, the short circuit caused by low insulation is a cause of defect. If the safety lock protects several chains, try to find a chain because of which the safety lock fuses, including each of chains in turn (if it is possible). Always have a set of spare safety locks of various power in the car. They have to be fixed at the basis of the block of safety locks.


The relay is an electronic switch which is used for several reasons.

The relay can switch current with high voltage, without being in a chain on which this current flows, and it allows to use thinner wires and contacts.

The relay can have more than one managing director of a source, unlike the mechanical switch.

The relay can have function of the timer, for example, the relay used during the faltering work of screen wipers.

The majority of the relay are located in the block of safety locks in a motive compartment or behind the lower panel of finishing of the dashboard on the party of the passenger. Depending on type of the engine, year of release and the installed equipment additional individual relays can be installed in a motive compartment and in various other places of the car.

1. If the chain or system controlled by the relay fails, and you suspect that the relay is guilty of it, include system.
2. If the relay works, you have to hear click when giving of food on it, in this case, a source of malfunction is any other element of system or connecting wires.
3. If the relay does not come into action, so or the relay does not receive food or the switching tension, or the relay is faulty.
4. An inspection of the relay is carried out replacement with its serviceable relay. At the same time be attentive as though some relays look and function equally, happens that relays look probably, but function variously.


Before removal of the relay check in the beginning that ignition was switched off. Then the relay can just be got from a nest and to insert on its place new.