Opel Corsa B 1993–2000 Service and Repair Manual: Fuses and relays - general information

1. All the car's electrical circuits are protected by fuses; most of the fuses are found in a fuse/relay box located under a cover to the right of and below the steering column (see illustration).

Removing the cover from the fuse/relay box

2. Typical fuse applications are given in the Specifications; model specific information will be found printed on the fuse/relay box lid.

3. The fuses are of the 'blade' type. Their ratings are printed on their backs and additionally they are colour-coded. A blown fuse may be recognised by its melted or missing wire link.

4. When renewing a fuse, switch off the circuit(s) concerned first. If the new fuse blows immediately when switching on, find and rectify the cause. The most usual cause of a blown fuse if a short-circuit to earth somewhere along the wire feeding the component concerned. The wire may be disconnected, trapped or frayed. Pay special attention to wire runs through grommets, under carpets etc.

5. Where a blown fuse serves more than one component, the defective circuit can be traced by switching on each component in turn until the replacement fuse blows.

6. Never attempt to bypass a fuse with silver foil or wire, nor fit a fuse of a higher rating than specified. Serious damage, or even fire, may result.

7. Models with a full range of optional equipment may carry one or two fuses on the other side of the fuse/relay box. When a headlamp washer system is fitted, its fuse and relay are mounted under the bonnet on the left-hand suspension turret (see illustrations).

Headlamp washer relay and fuse

Removing the headlamp washer fuse

8. All models have some relays on the accessible side of the fuse/relay box; according to equipment level, some other relays may be found on the reverse side.

Unclip the box to gain access. The relays are as shown (see illustrations)..

Relay identification

1. Flasher unit
2. Heated rear window relay
3. Windscreen wiper relay/delay unit
4. Front foglamp relay

Fuse and relay identification (reverse side of fusebox)

5. Trip computer relay
6. Rear wiper relay (not GTE)
7. Day running lamp relay (not UK)
8. Headlamp cut-out (not UK)
9. "Lights-on" warning buzzer

19. Central locking fuse
20. Electric window winder fuse

9. A relay is essentially an electricallyoperated switch. If a circuit served by a relay becomes inoperative, remember that the relay could be at fault. Test by substitution of a known good relay.