Some attribute the Volkswagen Passat b4 not to the 4th generation, but to the restyled model of the 3rd generation, due to the fact that they have a common design, but a different body and an updated interior. This series was produced b4 in 1993, 1994, 1995 and 1996. In this material, we will present a designation of fuses and relays Volkswagen Passat B4 with a boxes diagram and a photo example of their location.
Fuse and relay box
It is located at the bottom of the dashboard on the driver’s side, behind a protective shelf.
Access to fuses and relays opens after removing it.
Photo for example
Diagram
Protected components
| 1 | 10A Low beam (left headlight) |
| 2 | 10A Low beam (right headlight) |
| 3 | 10A Illumination of a combination of devices and license plate |
| 4 | 15A Tailgate glass cleaner, sunroof, self-leveling rear suspension control unit |
| 5 | 15A Windshield wiper, windscreen and rear window washer |
| 6 | 20A Heater fan, air conditioner |
| 7 | 10A Side light (right) |
| 8 | 10A Side light (left) |
| 9 | 20A Heated rear window and rear-view mirrors |
| 10 | 15A Fog lights and rear fog lamp |
| 11 | 10A High beam (left headlight), high beam indicator lamp |
| 12 | 10A High beam (right headlight) |
| 13 | 10A Horn, radiator fan (after turning off the engine) |
| 14 | 10A Reversing lamps, electric outside mirrors, heated washer nozzles, heated seats, engine temperature sensor, automatic transmission selector dial illumination |
| 15 | 10A Carburetor or electronic engine management system |
| 16 | 15A Instrument cluster, glove box lighting |
| 17 | 10A Direction indicators |
| 18 | 20A Electric gasoline pump, oxygen concentration sensor (lambda probe) |
| 19 | 30A Cooling fan, air conditioner |
| 20 | 20A Stop lights, speed control system |
| 21 | 15A Interior lighting lamps, luggage compartment, clock, central locking, cigarette lighter and instrument cluster |
| 22 | 10A Car radio |
The fuse number 21, 15A, is responsible for the cigarette lighter.
Relay
1 | Air conditioning system |
2 | Intermittent rear wiper |
3 | Forced idle switch, idle speed increase valve, engine management system (Digifant) |
4 | Reserve |
5 | Coolant level indicator |
6 | Alarm system |
7 | Headlight cleaning system |
8 | Intermittent wiper and washer system |
9 | Seat belt warning system |
10 | Fog lights |
11 | Sound signal |
12 | Fuel pump, intake manifold heating (where provided) |
13 | Heated rear window timer |
14 | Reserve |
15 | ABS hydraulic pump |
16 | ABS |
17 | Reserve |
18 | Reserve |
29 | Air conditioning system |
20 | Reserve |
21 | Fuse for ABS hydraulic pump and electric glass drive |
22 | ABS valve system fuse |
23 | Reserve |
24 | Reserve |
The number of relays in the unit depends on the equipment and the year of manufacture of the vehicle.
Relay assignment according to their numbering
- No. 4 – alarm relay not wearing seat belts
- No. 13 – air conditioning compressor
- No. 15 – additional lights (PTF)
- No. 18 – unloading tire X
- No. 19 or No. 99 – windshield wipers (No. 99 – with an adjustable pause)
- No. 21 – alarm and direction indicators
- No. 22 – emergency signaling and direction indicators, a car with a trailer
- No. 29 – relay of not fastened seat belts
- No. 30 – the main injection relay, gives a command to turn on the fuel pump
- No. 32 – ECU power supply (Digifant)
- No. 33 – headlight washer
- No. 43 – indicator of a drop in the level of the coolant (up to 91g.v.)
- No. 46 – time relay before starting heating
- No. 53 – two-tone signal (one tone – jumper)
- No. 54 – power cut off for forced. idle move
- No. 55 – increasing the fuel supply for forced. idle move
- No. 59 – Heated seats
- No. 61 – heating the intake manifold
- No. 67 or No. 80 – fuel pump
- No. 72 – rear wiper
- No. 78 – ABS pump
- No. 61 – ABS ECU
- No. 80 or No. 67 – fuel pump
- No. 99 or No. 19 – windshield wipers (No. 99 – with an adjustable pause)
- No. 105 – climate relay
- No. 109 – Relay for injection and ignition system (VR6)
- No. 150 – Starter and reversing lights (for cars with automatic transmission)
Fusible links
On models with diesel engines, the engine glow plugs supply circuit is fused. This insert is located in the engine compartment above the brake booster or on the electronic spark plug control unit, behind the windscreen washer reservoir. If this insert is burned out. it means that something has happened to the system, therefore, before replacing the insert, it is necessary to diagnose the diesel engine heating system and identify the cause of the burnout.
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