Fiat Ducato 244 – Low beam failure

Reading time 3 minutes

Updated – November 2, 2023

The failure of low beam, fog lights and instrument lighting on the Fiat Ducato 244 can have several causes, which are described below.
Illustrations regarding the security locations are taken from the original manual for illustration purposes.
The excerpts of the circuit diagram come from the Windows program e-Learn FIAT Ducato. All circuit diagrams are available for download as a PDF by clicking on them.

Fuses

Fuses can be found on the driver's side to the left of the steering column (CFB), including fuse tweezers (D), on the right on the passenger side under the glove compartment (CFO), each behind removable plastic covers, and in the engine compartment on the driver's side (CVM) under one, using a Torx screw (b) attached to the fuse/relay housing, unlockable (C) Plastic cover (D) and attached to the left of the fuse holder directly to the positive pole of the battery (CBA).

To get straight to the point: the 5 A fuse (F 24 – CFB) was the culprit.

But there are also connectors on the steering column (under the top and bottom covers, as well as at the bottom of the switch unit (hazard lights, fog lights, ABS) that can trigger the same phenomenon due to oxidation. Contact spray and repeated unplugging and plugging clears the error. provided all backups are innocent.

The 150 A fuse (F 70 - CBA) connected upstream of the relay for the left and right low beam, as well as the 10 A fuses connected upstream of the relay contact 87 (T02) (30) and the low beam lamps (F 14 and F 15 CVM ), are usually not the cause of the problem.

The relay T02 (CVM) is located directly below the two fuses F 24 and F 14 (CVM).

CFB

Identifier	Amp	Purpose
Q12	5	Parking lights (right – front / rear)
F13	5	Parking lights (left – rear right)
F24	5	License plate light, operating lighting, lamp for parking lights
F25	7,5	radio
F26	7,5	brake-lights
F27	7,5	electric mirror, cruise control, tachograph, telephone, remote control
F31	10	Ignition switch
F32	15	radio
F33	7,5	Rear fog light
F35	7,5	ABI, window regulator
F37	10	Instrument panel, PCC
F39	10	Interior lighting, EOBD
F42	7,5	ABS control unit
F43	15	Windshield washer pump
F44	15	cigarette lighter
F49	15	Headlight washer pump
F50	7,5	Airbag control unit
F51	10	PCA (ambulance version)
F52	20	Front socket
F53	10	Direction indicators, hazard lights, instrument panel
F55	30	Electric fan (inside)

CFO

Identifier	Amp	Purpose
F34	10	Tachograph, telephone, remote control
F38	20	ABI door blocking
F40	15	heated Disc on the right
F41	10	Exterior mirror heating
F45	15	Driver's seat heating
F47	20	ABI window regulator left
F48	20	ABI window regulator right
F54	15	heated Disc on the left
F57	15	Additional e-fan
F58	5	Webasto timer
F59	15	food container
F60	10	Hazard lights
F61	20	Webasto Group
F64	20	Siren (ambulance version)
F65	10	Socket (special facilities

CVM

Identifier	Amp	Purpose
F01	60	CFB ECU protection
F02	50	Spark plug preheating control unit
F03	30	Ignition switch
F04	50	ABS control unit
F05	30	Fan (inside)
F06	40	Fan (cooler – level 1)
F07	40	Fan (radiator – stage 2), remote ignition coil switch
F08	30	Windshield wiper motor
F09	15	Fog lights
Q11	10	Engine control unit
F14	10	right dipped beam
F15	10	Low beam left
F16	7,5	IE system, FIAT code
F17	5	IE service
F18	7,5	FIAT code, engine control unit
F19	7,5	compressor
F20	30	PTC
F21	15	Fuel pump
F23	10	Automatic switching control unit
F24	15	Automatic switching control unit

CBA

Identifier	Amp	Purpose
F70	150	CVM control unit
F71	80	CFO control unit
F72	70 / 100 / 125*	Three-phase generator
F73	70	Construction

*Depending on engine type (2.0 JTD, 2.8 JTD)

Circuit diagram for outdoor lighting (excerpt)

Instrument lighting circuit diagram (excerpt)

The fuse F 24 is noted here - and can therefore also be traced to the cause...!

Wiring diagram for fog lights (excerpt)

relay

Relays can be tested quite easily by applying 12 V DC to coil contacts 85 and 86: If they switch when voltage is applied and continuity can be measured between the relay contacts, the relay is functional.