5 DIAGNOSTICS Fault finding XF 95 series 3.1 SHORT CIRCUITS A short circuit is caused by a positive wire shorting to earth somewhere. In most cases this will cause a fuse to blow. To remedy this failure, use a test lamp of approximately 70 W. First check the diagram to see which consumers are connected to the fuse in question, and then switch them all off. Remove the fuse and connect the test lamp in its place. Now switch each of the consumers on and off one by one. If the lamp comes on very brightly when a consumer is switched on, the fault is almost certainly in the wiring of that consumer. Now check the diagram to see via which connectors the consumer is connected.
Now disconnect the first wiring connection (as seen from the fuse). If the lamp is still bright, the fault is between the fuse and this wiring connection. 1 W 5 03 013 If, however, the lamp goes out, the fault is somewhere further on in the wiring. Now reconnect the connectors and disconnect the next wiring connection. If the lamp is still bright, the failure is between these two wiring connections. However, if the lamp goes out again, the fault-finding procedure must be continued. The faulty wiring section can be found in this way. 3-2 200303