18.3. Safety locks

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.

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. The current protected by 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.