AR54.10-P-1030-09RT Locate Defective Consumers Via Power Supply

AR54.10-P-1030-09RT Locate Defective Consumers Via Power Supply

Commercially Available Tools:

Component Identification:

1.1 When measuring with multimeter:
Measure the voltage drop directly at the fuses of the front prefuse (F32) and the battery compartment prefuse box.
Use measuring tips.
Perform measurements with fuses still inserted - defective consumer cannot be identified if fuse is removed.
Increased quiescent current consumption exists at a consumer if the voltage drop exceeds 100 mV.

1.2 When measuring with current clamp:
Measure the quiescent current at terminals 30 of the front prefuse (F32) and the battery compartment prefuse box.
Perform measurements with fuses still inserted - defective consumer cannot be identified if fuse is removed.
2.1 If increased quiescent current consumption has been detected at a consumer which is directly connected to one of the prefuse boxes:
See step 3.
2.2 If increased quiescent current consumption has been detected in the engine compartment fuse and relay box (F58), the load compartment fuse and relay box (F4) or the cockpit fuse box (F3):
Measure voltage drop at fuses in engine compartment fuse and relay box (F58), cockpit fuse box (F3) or load compartment fuse and relay box (F4) using multimeter, depending at which prefuse a voltage drop greater than 100 mV has been detected or a quiescent current consumption between 0.05 and 1.6 A has been detected.
Use measuring tips.
Perform measurements with fuses still inserted - defective consumer cannot be identified if fuse is removed.
Increased quiescent current consumption exists at a consumer if the voltage drop exceeds 100 mV.

3. Remove fuse of consumer identified as being defective and check whether quiescent current consumption drops below 0.05 A. If this is the case, defective consumer has been located. If this is not the case, repeat defective consumer search.