Checking connectors and wiring
NOTE:
From and including w50 2001, the fan is connected directly to connector C with no wiring in-between.
Check the wiring between the climate control module (CCM) and fan motor. Check for an intermittent short-circuit to ground and supply voltage.
Check the wiring for the control module. Check for an intermittent open-circuit.
Check connector C. Check for contact resistance and loose connections.
Other information:
- To access or replace the control module, see Dashboard environment panel (including climate control module (CCM)), replacing
- To access or replace the blower fan motor, see Blower fan motor passenger compartment temperature sensor, replacing
- For other values, see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Information