Suzuki Forenza / Chevrolet Lacetti – Fuse and Relay

Chevrolet Lacetti was produced with sedan, station wagon and hatchback bodies in 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 and 2014. It was also sold under the name Suzuki Forenza. We suggest that you familiarize yourself with the description of the diagrams of relay and fuse boxes for the Chevrolet Lacetti, show photos of the bloxes, the purpose of the elements, and also tell you where the fuse is responsible for the cigarette lighter.

Chevrolet Lacetti photo

Engine compartment

Main fuse box is located on the left side, between the battery and the coolant expansion tank.

fuse box under the hood of the Lacetti

On the inside of the cover, the original fuse and relay diagram is applied.


fuses chevrolet lacetti

Circuit breakers

Ef1 (30 A) – Main battery (circuits F13-F16, F21-F24) .

Ef2 (60 A) – ABS .
See F11.

Ef3 (30 A) – stove fan .
See F7.

Ef4 (30 A) – ignition (starter, chains F5-F8) .
If the starter does not turn, check also relay 4 on the bracket under the dashboard on the driver’s side. Make sure that the battery is charged and its terminals are firmly fixed, put the gearshift lever in neutral and close the contacts on the retractor relay near the starter. This will check that the starter is working properly. If it works, look for broken wiring. If it does not work, apply voltage to it with separate wires directly from the battery. It will work – most likely the contact on the body, the wire from the battery to the body of the car, has weakened.

Ef5 (30 A) – ignition (circuits F1-F4, F9-F12, F17-F19) .
Check relay K3.

Ef6 (20 A) – cooling system fan (radiator) .
If the fan does not turn on (it is rather difficult to determine its operation by sound, because it works quite quietly), check, in addition, fuses Ef8, Ef21 and relays K9, K11. Check that the fan is working properly by applying voltage directly from the battery. If the engine itself is running, check the antifreeze level, the coolant temperature sensor, the radiator cap and the expansion tank (the valve in the cap must work properly, the plug must be tight), the thermostat is in good condition. In the worst case, if there are problems with the temperature and pressure of the antifreeze, the cause may be a burnout of the cylinder head gasket.

Ef7 (30 A) – rear window heating .
See F6.

Ef8 (30 A) – high speed of the cooling fan (radiator) .
See Ef6.

Ef9 (20 A) – power windows in the right front and rear doors .
See F6.

Ef10 (15 A) – electronic control unit (ECU), ignition coils, EGR valve .

Ef11 (10 A) – Main relay circuit, engine control module (ECM) .

Ef12 (25 A) – headlights, dimensions .
If only one side of the size bulbs does not light, check fuses Ef23 or Ef28. If the front side lights do not light up, check the lamps in the headlights, as well as the contacts of the box, which may disappear due to a poor connection. To replace the bulbs, you will most likely have to remove the air filter housing.

Ef13 (15 A) – brake lights .
If none of the brake lights are on, including the additional one, check in addition the fuse F4, as well as the frog-switch on the brake pedal and its connector with wires. If the additional brake light works, but the main ones do not, replace the lamps in the headlights, the lamps are two-filament, both could burn out. Also check the pins in the landing connectors and the wiring.

Ef14 (20 A) – power window in the driver’s door .
See F6.

Ef15 (15 A) – high beam lamps in headlights .
If the high beam does not turn on, also check the K4 relay, the serviceability of the lamps in the headlights and the contacts in their connectors (they could oxidize), the light switch to the left of the steering wheel. Measure the voltage at the headlight connectors. If, when the high beam is on, there is no voltage on the necessary contacts, then there is a malfunction in the wiring or the steering column switch.

Ef16 (15 A) – sound signal, siren, hood limit switch .
If the sound signal does not work, check in addition to this fuse, relay K2. A common problem is the absence or disappearance of contact on the body, which is located on the side member behind the left headlight. Strip and make reliable contact. Check the voltage at the signal terminals, if not, then the wiring or buttons on the steering wheel. Test the signal itself by applying 12V directly to it. If defective, replace with new one.

Ef17 (10 A) – air conditioning compressor .
See F6.

Ef18 (15 A) – fuel pump .
If the gasoline pump does not work, check, in addition, fuse F2 in the passenger compartment mounting box, fuse Ef22 in the engine compartment and relay K7, as well as the serviceability of the pump itself by supplying 12 V directly to it. If it works, ring the wires for an open and check the contacts. If it doesn’t work, replace it with a new one. To remove the fuel pump, you need to disconnect the battery, remove the rear seat cushion, open the hatch, disconnect the fuel lines, squeeze the retaining ring and pull out the fuel pump. If the required pressure is not created in the fuel system, the matter may be in the pressure regulator.

Ef19 (15 A) – dashboard, electric folding mirrors, lamps for individual light in the cabin, common ceiling light in the cabin, light in the trunk, limit switch for the position of the trunk .
See F4.

Ef20 (10 A) – left headlight, low beam .
If the dipped in the right headlight is off, see fuse Ef27.
If the dipped beam lamps in both headlights have gone out, check the lamps, two could burn out at the same time, as well as their connectors, contacts in them and the presence of moisture. Also, the reason may be in the wiring from the C202 connector to the light switch on the steering wheel. Check it under the dashboard, it could burn, especially if you have a hatchback. Also check that the steering column switch is in good condition.

Ef21 (15 A) – electronic control unit (ECU), adsorber purge valve, oxygen concentration sensors, phase sensor, cooling system fan (radiator) .

Ef22 (15 A) – fuel pump, injectors, EGR valve .

Ef23 (10 A) – side light bulbs on the left side, license plate illumination lamp, warning signal .
See Ef12.

Ef24 (15 A) – fog lights .
Fog lights in most cases only work when the dimensions are on.
If the “fog lights” stop working in wet weather, check if water has got into them, as well as the serviceability of the lamps.

Ef25 (10 A) – electric side mirrors .
See F8.

Ef26 (15 A) – central locking .

Ef27 (10 A) – right headlight, low beam .
See Ef20.

Ef28 (10 A) – side light bulbs on the right side, dashboard and center console lights, radio lights, clock .

Ef29 (10 A) – reserve;
Ef30 (15 A) – reserve;
Ef31 (25 A) – reserve.


  • 1 – dashboard and center console backlight relay .
  • 2 – horn relay .
    See Ef16.
  • 3 – main ignition relay .
    Check fuse Ef5.
  • 4 – headlight relay in the headlights .
  • 5 – fog lamp relay .
    See Ef24.
  • 6 – air conditioner compressor clutch .
    See F6.
  • 7 – fuel pump, ignition coils .
    See Ef18.
  • 8 – power windows .
  • 9 – low speed of the cooling system fan (radiator) .
    See Ef6.
  • 10 – rear window heating .
    See F6.
  • 11 – high speed of the cooling system fan (radiator) .
    See Ef6.

Passenger compartment

Fuse box

It is located on the left side at the end of the dashboard. To access, open the left front door and remove the fuse panel cover.

fuse box in the salon lacetti


circuit diagram of the fuse box in the salon of the Lacetti


F110A AIRBAG – Electronic airbag control unit
F210A ECM – Electronic engine control unit, electronic control unit for automatic transmission *, generator, vehicle speed sensor
F315A TURN SIGNAL – Hazard switch, direction indicators
F410А CLUSTER – Instrument panel, electronic unit for automatic switching on of low beam headlights *, sound signaling device, brake signal switch, electronic steering gear control unit with variable effort *, air conditioning switch *
F610А ENG FUSE – Relay for turning on the air conditioner compressor, relay for turning on the heated rear window, relay for turning on electric windows, relay for turning on headlights
F720А HVAC – Relay for turning on the electric air conditioner fan, air conditioner switch, climate control system *
F815A SUNROOF – Electric mirrors switch, electric folding mirrors *, electric sunroof *
F925А WIPER – Wiper gear motor, wiper mode switch
F1010А HANDS FREE – Speakerphone
F1110A ABS – ABS control unit. ABS executive unit
F1210А IMMOBILIZER – Immobilizer, electronic anti-theft alarm control unit, rain sensor
F1310A Automatic transmission control unit *
F1415A HAZARD – Alarm switch
F1515A ANTI-THEFT – Electronic anti-theft alarm control unit
F1610A DIAGNOSIS – Diagnostic connector
F1710A AUDIO / CLOCK – Audio system, clock
F1815А EXTRA JACK – Additional socket
F1915A CIGAR LIGHTER – Cigarette lighter fuse
F2010A BACK-UP – Reverse light switch, automatic transmission mode selector *
F2115А REAR FOG – Relay for turning on rear fog lamps, relay for lighting devices and controls, side lighting
F2215A ATC / CLOCK – Clock, climate control system *, air conditioner switch *
F2315A AUDIO – Audio system
F2410А IMMOBILIZER – Immobilizer

The fuse number 19 is responsible for the cigarette lighter.


They are mounted on a special bracket located under the dashboard near the pedals. Access to them is extremely difficult. First you need to open the box for small things and unscrew the two screws with a screwdriver.

relay in lacetti

Then, overcoming the resistance of the three clips, we remove the lower lining from the dashboard, release it from the hood lock drive and completely remove it.

relay in lacetti

In the space that opens, you need to find the desired bracket.

relay in lacetti circuit


  1. battery protection system control unit;
  2. direction indicator interrupter;
  3. relay for turning on the fog light in the rear lights;
  4. starter blocking relay (for vehicles with automatic transmission).

Depending on the vehicle configuration, (BLOWER RELAY) – air conditioner fan relay, (DRL RELAY) – headlamp forced light relay are also installed there.

On our YouTube channel, we also posted a video. Watch and subscribe.

And if you know how to make this post better – write in the comments.

Leave a Reply

Your email address will not be published. Required fields are marked *