Battery and alternator faults (General information / Help with malfunctions / Ford Mondeo 3 2000-2007)

Cause	elimination
A. The red control lamp does not light up when the ignition is on.
The battery is empty. An open in the battery wire, wire contacts are loose or oxidized. Control lamp defect. Break in the wire between the lock - the ignition switch, the control light and the generator. Defective voltage regulator. Damaged generator. Moisture has formed an insulating lubricating film between slip rings and carbon brushes (e.g. after washing the engine) generator.	Use an auxiliary wire or have the vehicle towed. Check battery wires and clamps. Replace. Check the current flow with a test lamp. Replace regulator. Repair generator or replace. Blow out the generator with compressed air, clean the slip rings and brushes if necessary.
B. Charge control lights up or glows when the engine is running.
Loose or broken V-belt. Insufficient contact of the wire connections of the generator or a break in the wire.	Check the tension of the V-belt, replace the belt if necessary. Check wires and wire connections.
Q. The surface of the battery is wet.
The battery cells are full of distilled water. Dirty battery locks.	Release gases, do not suck electrolyte. Clean the vent holes with a pin.
D. The battery emits a lot of gases.
Defective voltage regulator.	Check regulator, replace if necessary.

Battery and alternator faults