Electrical system (Opel Omega A)

The battery does not hold a charge for more than a few days

• The battery is internally faulty
• Battery terminals are loose or corroded
• Auxiliary drive belt is worn or incorrectly adjusted
• The generator does not produce the required current
• The generator or voltage regulator is faulty
• Short circuit causing battery to drain continuously

The ignition on/battery discharge indicator light comes on while driving

• The auxiliary drive belt is damaged, worn or improperly adjusted
• Generator brushes are worn, jammed or dirty
• Weak or damaged generator brush springs
• Internal damage in the generator or voltage regulator
• The wiring in the charging circuit is damaged or open.

The ignition on/battery discharge indicator lamp does not light

• The indicator lamp has burned out
• The wiring in the lamp circuit is damaged or open
• Generator is faulty

Headlights and turn signals do not work

• The light bulb burned out
• Corrosion of the lamp holder or lamp holder contacts
• The fuse has blown
• Faulty relay
• The electrical wiring is damaged or open
• Defective switch.

Instrument readings/readings are inaccurate or erratic

Instrument readings increase with increasing engine speed

• Faulty voltage regulator

Fuel or temperature gauge shows "0"

• The pointer sensor is faulty
• The indicator wiring is open
• Faulty pointer

Fuel or temperature gauge constantly shows maximum value

• The pointer sensor is faulty
• Short circuit
• Faulty pointer

The sound signal does not work or does not work correctly

The sound signal is constantly emitted

• Horn key shorted to ground or stuck in pressed position
• The horn cable contact with the key is shorted to ground

The sound signal does not work

• The fuse has blown
• The cable or its connections are loose, damaged or disconnected
• The sound signal is faulty

The horn produces an intermittent or unsatisfactory sound

• The cable connections are loose
• Horn fasteners are loose
• The sound signal is faulty

Windscreen wipers do not work or work poorly

Windscreen wipers do not work or work very slowly

• The wiper blades are stuck on the glass or the rod is jammed
• The fuse has blown
• The cable or its connections are loose, damaged or disconnected
• Faulty relay
• The windshield wiper motor is faulty

The wiper blades cover too much or too little of the glass

• The wiper arms are not positioned correctly on the axles
• Excessive wear of the wiper linkage
• Windscreen wiper motor or rod mounts are loose

Windscreen wiper blades are unable to clean the glass effectively

• The rubber of the brushes is worn out or damaged
• The windshield wiper arm springs are damaged or the arm hinges are jammed
• The concentration of the active substance in the washer fluid is not sufficient to remove plaque from the windshield

Windshield washers do not work or work poorly

One or more washer jets are not working

• The washer jet is blocked
• The hose is disconnected, pinched or clogged
• Not enough fluid in the washer reservoir

The washer pump does not work

• Electrical wiring or connectors are damaged or open
• The fuse has blown
• Defective washer switch
• The washer pump is faulty

Liquid is ejected from the jets some time after the pump is turned on

• The one-way valve in the supply hose is faulty

Electric windows do not work or work poorly

The glass only moves in one direction

• Faulty switch

The glass moves slowly

• The regulator is damaged, jammed or needs lubrication
• Internal door components or trim are interfering with the movement of the adjuster
• Motor faulty

The glass does not move

• The fuse has blown
• The relay is faulty
• Electrical wiring or connectors are damaged or open
• Motor faulty

The central lock does not work or works poorly

The system is not working

• The fuse has blown
• The relay is faulty
• Electrical wiring or connectors are damaged or open
• Motor faulty

The lock bolt closes but does not open or vice versa

• The master switch is faulty
• Damaged or disconnected rods or valve levers
• The relay is faulty
• Motor faulty

One of the actuators is not working

• Electrical wiring or connectors are damaged or open
• The actuator is faulty
• Damaged or disconnected rods or valve levers
• The valve is damaged