The Scania 3rd generation truck series was produced in 1987, 1988, 1989, 1990, 1991, 1992, 1993 and 1994. Depending on the region of delivery, the Scania 3 was supplied with both a cab over the body and a lifting body. This publication provides a description of the Scania 3 fuses and relays with block diagrams and their location. We will highlight the fuse responsible for the cigarette lighter.
The main fuse and relay blocks are located inside the vehicle, on the right side of the instrument panel, on the passenger side, behind a protective cover. The circuit diagram can be printed on the back.
Scania 3 main unit
| 1 | 10A Dipped beam, right |
| 2 | 10A Low beam, left side |
| 3 | 10A High beam, left side, headlight |
| 4 | 10A high beam right |
| 5 | 10A instrument lighting |
| 6 | 20A rear fog lights, license plate lights, work lights |
| 7 | 20A side marker light, right |
| 8 | 10A Headlight cleaner and washer |
| 9 | 20A parking light, left, parking light |
| 10 | 10A Windshield wipers and washers |
| 11 | 10A Automatic brake on slope, brake lights |
| 12 | 10A bulbs for control units and displays |
| 13 | 10A outside temperature sensor, odometer, retarder, warning lights, intercooler bypass valve, transmission oil cooling system |
| 14 | 10A Turn signal, axle load limiter |
| 15 | 20A taillights, high beam horn |
| 16 | Gearbox 10A |
| 17 | 10A Handbrake for descent, air suspension, white smoke limiter, rear axle lift, additional heating, differential lock |
| 18 | Interior lighting 10A, flashing beacon, memory code/radio, central locking, additional heater, step lighting |
| 19 | Cigarette lighter 10A, clock, tachograph, diagnostics, odometer, portable lamp socket |
| 20 | 10A radio |
| 21 | 20A horn, fan, air conditioner |
The Scania 3 cigarette lighter is controlled by fuse No. 19 at 10A.
Scania 3 relay
| A | Power supply, ignition key position |
| B | Power supply, parking lights |
| C | Reserve |
| D | Reserve |
| E | Periodic operation of windshield wipers |
| F | Low brake pressure warning light |
| G | fan motor |
| H | taillights |
| TO | Rear fog lights |
| L | Coolant level |
| M | White smoke limiter |
| N | Starter lock |
| About | Reserve |
| P | radio |
| R | Power bus 61, charging from generator |
| S | air conditioning |
Scania 3 additional units
Block 1
- 20A parking heater, high beam
- 20A transmission cooling, auxiliary heating
- 10A burner ignition, auxiliary drive, automatic transmission
- Fog lights 10A
- Fog light 20A
- Reserve
Block 2
- 20A air dryer, electric heated seats and mirrors
- 10A warning signals, battery heating, fuel heating
- 10A EDC
- 20A EDC
- 20A mirror lift, mirror adjustment
- 10A CAG – emergency switch, speed limiter
Block 3
In the older version Wabco “B” Bosch “Diagnos” Bosch “Gamma” there are ABS fuses here, in the newer Bosch “Gamma” Wabco “C” there are:
- Supply voltage 30 A trailer control valve
- Power supply voltage control unit 5A, trailer
- Reserve
- 10A emergency alarm, car
- Control unit supply voltage 5A
- Relay supply voltage 20A R7, R10
Scania 3 relay
- Transmission cooling relay (relay R5)
- Electronic Engine Control (EDC R34)
- EDC, diode block (D18)
- EDC+CAG (R43)
- ADR Horn Relay (R41)
- Retarder relay (R78)
- Separate trailer brake lights (R33)
- High beam relay (R6)
- Fog light relay (R15)