Opel Corsa B - the Repair manual and operation

14.3. Safety locks - the general information

Various combinations of safety locks, breakers of a chain and fusible inserts can be applied to protection of contact chains of electric equipment of the car.

The most part of safety locks (and the relay) is located on the considered models of cars in the assembly block located at the left under the dashboard. The procedure of removal of the assembly block is described in the Head Kuzov.

The second assembly block of safety locks/relay is located in a motive compartment of the car, has a separate design and is equipped with removable covers

Each separate safety lock is used for protection of any concrete electric contour or at once several contours. The ID card with the scheme of placement of safety locks in the assembly block is usually glued to a cover of the last, from its internal party.

In assembly blocks the safety locks of a compact design equipped with bayonet contacts, and which if necessary are easily taken by fingers from the nests in the block are used. At refusal any of consumers of the electric power first of all it is always necessary to check a condition of the corresponding safety lock. Turn a key in the ignition lock in situation II and by means of a lamp sampler probe open plugs of each of safety locks. If the lamp lights up at connection to each of plugs, therefore, a safety lock as it should be. If tension takes place only from giving of food, so the safety lock fused. Let's notice also that usually the case of a safety lock is manufactured of transparent plastic through which it is easy to define a condition of a working crossing point.

The fact of burn-out of a contact crossing point of a safety lock is easily elicited at visual survey of the element having the translucent case

When replacing of the fused safety lock strictly you watch that the prepared replaceable element corresponded on the type which failed. The safety locks calculated on various nominal current physically can differ in nothing from each other, without being at the same time interchangeable. Each of electric chains has various working parameters and needs various degree of protection therefore replacement of the safety lock calculated on a certain current not corresponding to it in parameters is fraught with the most serious consequences (up to fire emergence). Working parameters of a safety lock (nominal current) are usually designated on its plastic case, besides, color identification in addition is used (see Specifications in the Head Onboard electric equipment).

From the inside of a cover of the assembly block the special clip which use allows to facilitate the procedure of extraction of a safety lock considerably can be attached.

The special clip for extraction of safety locks usually fastens to inside of a cover of the assembly block

If the new safety lock at once after installation also fails, it does not make sense to make its further replacement, - before it is necessary to reveal and remove the cause of an overload in a chain. In most cases that appears the short circuit of a connecting electrical wiring caused by damage of its isolation. Spare safety locks usually are located in free blocks of the assembly block.

On all models of the cars considered in the Present Manual additional protection of electric equipment is provided by at most eight main safety locks placed in the separate block equipped with a cover fixed on a wall of the assembly block placed in a motive compartment. Knocking-out of any of the main safety locks leads to a de-energization of the most part of electric equipment. Before starting replacement of the main safety locks without fail switch-off the rechargeable battery. Replaceable main safety locks can always be got in supply division at company car repair shop Opel.

If the stereosystem established on the car is equipped with a security code before disconnecting the battery make sure that you have the correct combination for input of the audio system in action! Remember that the failed main safety lock has to be replaced with replaceable calculated on the same current.