Functional Description
- Make
- Alfa Romeo
- Model
- 155 Factory Service Manual
- Year
- 1992–1998
- Section
- Functional Description › Functional Description
Functional Description
The air conditioner electric fan speed adjuster Q31 is supplied by the line coming from relay I35 and fuse F13 (20A) in fusebox G1; it is connected to ground and to the control unit Q21a by the signal at pin 3 of the control unit connector; it is also connected to the heating-ventilation electric fan Q1 to which it sends a negative signal which regulates the speed. The incorporated temperature sensor is connected to the control unit Q21a at pin 6 of connector C and pin 3 of connector B.
The fan Q1 is supplied directly by battery voltage via fuse Q39 (30A) located in the relays and fuses assembly Q41.
Starting from chassis N., the layout of the air conditioner wiring has been changed without though modifying the connections described above.
Parts & tools for this job For 1992 Alfa Romeo 155
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Alfa Romeo 155 1992 cabin filter
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.