Volkswagen Transporter T4 – fuse and relay

Volkswagen Transporter T4 – represents the 4th generation of the legendary Transporter series. This model was produced in 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 and 2003 with diesel and gasoline engines with different wheelbases: short and long, and with different roof height. Also on the T4, Volkswagen continued its lineup of luxury Caravelle, California and Multivan models. In our material, we will show the location of all electronic control sides and a detailed designation of the purpose of fuses and relays Volkswagen T4 with box diagrams in which they are located and their photographs. Note the fuse responsible for the cigarette lighter.

The actual purpose of the fuses may differ from the one presented and depends on the year of manufacture and the level of electrical equipment T4 .

Locations

Description

1 Air conditioning control unit 1 – with automatic temperature control – in the heater control panel, front
2 Air conditioning control unit 2 – with automatic temperature control – in the heater control panel, rear – central pillar
3 Evaporator Fan Control Unit (A / C) – With Rear A / C – Behind Right Rear Trim Panel
4 Air conditioning / heater fan motor control unit 1 – with automatic temperature control – front – fan unit
5 Air conditioning / heater blower motor control unit 2- with automatic temperature control – rear- bottom of the body, in the center
6 Aerial amplifier – behind the dash, passenger side
7 Alternator resistor – near additional relays – CV / AUF, with alternator 150A / automatic transmission / automatic temperature control – behind the central part of the dashboard
8 Additional battery – under the driver’s seat
9 Accumulator battery
10 Central locking signal control unit – behind the dashboard
11 Cruise control unit (with throttle motor) – cruise control is controlled by the ECM
12 Electronic cruise control module (without throttle motor) – behind dash, passenger side
13 Diagnostic connector (DLC) – instrument panel, driver’s side
14 Diagnostic unit – 05/99 (except for AAC / ABL / AET / AES / AJA) – in the instrument cluster
15 Cooling Fan Motor Relay – Behind Left Headlight
16 Cooling Fan Motor 1/2 Resistor – Behind Left Headlight
17 Coolant heater control unit (with additional coolant heater – D3W / B4W / D4W) – in the heater – underbody, in the center
18 Coolant heater control unit (with optional coolant heater – B7W / D7W) – behind the dash, passenger side
19 Engine oil pressure warning buzzer – in instrument cluster control unit
21 Fuse / relay box, instrument cluster 1
22 Fuse / relay box 2, dash – under dash fuse / relay box 1
23 Fuse / relay box, dash 3 – above dash fuse / relay box 1
24 Fuse / relay box, dash 4 – behind dash, center
25 Fuse / Relay Box, Driver’s Seat – Under Seat
26 Fuse / Relay Box, Engine Compartment – Battery Powered
27 Additional fuse (5A / 7.5A / 10A) – in the back of the audio system unit
28 Additional fuse (10A) – at the rear of the navigation system control unit
29 Headlights not switched off warning buzzer – in the instrument cluster control unit
30 Heater blower motor resistor – manual temperature control – blower unit, front
31 Horn 1/2 – behind the front bumper
32 Immobilizer control unit – behind the instrument cluster
33 Immobilizer ring antenna – near the ignition switch
34 Turn signal relay, alarm relay – in the alarm switch
35 Instrument Cluster Control Module / Digital Multifunction Display – In Instrument Cluster
36 Outside temperature sensor – behind the front bumper
37 Driver’s seat heating control unit – in the seat heating switch
38 Passenger seat heating control unit – in the seat heating switch
39 SRS control unit – under the dash, center
40 Sunroof electric control unit
41 Theme control unit – in the display of the navigation system
42 Telephone interface control unit – behind the instrument cluster
43 Electronic gearbox control unit – near the engine control unit
44 Vehicle speed sensor – gearbox

Passenger compartment

The main fuse and relay box is located under the dash on the driver’s side.

Main box

Photo for example

Diagram

Relay assignment

  1. (105) Heater blower motor relay – rear (ventilation)
  2. (174) Rear window wiper / washer relay
  3. (30/109) Engine management relay
  4. (18) Ignition auxiliary circuits relay 1
  5. Reserve
  6. (22/21) Emergency ventilation relay (with repeaters for direction indicators on the roof)
  7. (95) Headlight washer pump relay
  8. (99) Relay for intermittent operation of the windshield wiper / washer
  9. (36) Headlamps warning buzzer
  10. (53) Fog lamp relay
  11. (53) Horn relay
  12. (167) Fuel pump relay

Fuse

1 10A Left headlight – low beam, headlight range control
2 10A Right headlight – low beam, headlight range control
3 10A License plate lamps
4 15A Rear window wiper / washer, auxiliary ignition circuit relay 2, additional equipment
5 15A / 20A Windshield wiper / washer, heaters for windshield washer nozzles (05/01)
6 30A Air conditioning system, heater fan motor
7 10A Front right side / rear right side lamps
8 10A Lamps front left / rear left
9 20A Heated rear window, heated outside mirror
10 15A Fog lights, fog lights
11 10A left headlamp-high beam
12 10A RH headlamp-high beam
13 10A Sound signal
14 10A ABS system (with ESP), automatic transmission control system, additional equipment, central locking, cruise control system, power windows, power rear-view mirrors on the doors, reverse light (s)
15 10A Engine management system, crankcase ventilation heater, cruise control system, vehicle speed sensor
16 15A ABS indicator, glove box illumination lamp, turn signals, immobilizer, instrument cluster
17 10A Additional heater
18 20A Engine management system, fuel pump
19 10A Cooling fan motor control unit, coolant pump motor
20 10A Stop lights
21 15A Audio system, diagnostic connector (DLC), interior lamps, navigation system
22 10A Cigarette lighter fuse, radio

The fuse number 22, 10A, is responsible for the cigarette lighter.

Additional fuse box

It is located under the main block.

Designation

1 15A Accessory power connector
2 15A Trailer electrical connector
3 10A Roof identification light
4 20A Additional heater (AC V / AH Y / AJT / AU F)
5 10A Anti-lock braking system (ABS)
6 FOR Phone
7 15A Taxi
8 10A Roof fan
9 15A Audio system, instrument cluster
10 15A Central locking
11 15A Heated seats
12 30A Heated door mirrors, heated rear window
13 FOR PHONE (ACV / AH Y / AJT / AU F)
14 30A Air conditioning system – manual automatic temperature control
15 20A Additional heater

Additional relay box 1

Located at the top of the main unit.

Diagram

Assignment

1 (53) Coolant pump relay
2 (125) Idle speed control (AM) relay
3 (137) Glow plug control unit (ABL)
4 (53) Ignition auxiliary circuits relay 2 (some models)
5 (53) Ignition auxiliary circuits relay 2 (AES, with air conditioning)
F1 (30) Power window fuse
F2 (15) Engine control unit
F3 (15) Actuator

Additional relay box 2

It is located behind the dashboard in the center.

Diagram

Designation

1 (106) Auxiliary heater relay
2 Audio / Telephone Speaker Switch Relay
3 (53) Heater blower motor relay – rear (warm air)
4 (114) Heater blower motor relay – automatic temperature control
5 (152) Heater radiator coolant valve relay (rear heater)
6 (38) Air intake changeover actuator relay (A / C / heater)
7 (53) Alternator relay (AES, with 150A alternator)
8 (53) Alternator relay (ACV / AUF, with alternator 150A / automatic / automatic temperature control)
9 (175) Start inhibit switch relay / reversing lamp relay
10 (87) Wheel hub connection control unit

Another unit can be located under the driver’s seat. The following items may be located there: (214/426) Relay for additional battery, (403) Relay for additional heater, (30A) Additional liquid heating system, (5A) Sockets , etc.

Engine compartment

This unit is located on the cover in front of the battery.

Diagram

Protected components

1 60A Glow plug relay
2 50A Cooling fan motor
3 50A Cooling fan motor
4 50A Anti-lock braking system (ABS)
5 110A / 150A / 175A generator
6 30A System of maintaining exchange rate stability
7 30A Anti-lock braking system (with ESP)
8 5A System of maintaining exchange rate stability

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