Fused Components

Determine Fused Components With Increased Quiescent Current Consumption










References (WH), Commercially available tools.

1 Determine possible quiescent current loads connected to fuse in question. See assignment and wire connections for fuse blocks, insert sheet or "Electric wiring diagrams, models 170, 202, 210".


NOTE: See "Electric wiring diagrams, models 170, 202, 210" or Diagnosis Manual for location of components.


2 Disconnect coupling at the likely quiescent current consumer.
3 Read off quiescent current on second multimeter.


NOTE: If the measurement is performed at the fuse carrier of the radio or if the connector of the radio is disconnected, the quiescent current consumption may rise by about 0.240 A (240 mA). The increased quiescent current consumption is eliminated by switching the radio on and off.


Quiescent current > 0.02 A (20 mA):
Quiescent current fault still present after disconnecting connector. Component is okay, reconnect connector to component checked.

4 Perform test with all the components of the faulty fuse, as described.

Quiescent current <= 0.02 A (20 mA):
Quiescent current fault eliminated after disconnecting connector from affected component. Component defective, replace:

To check measure total quiescent current again.