Troubleshooting electrical equipment Mazda 121 (3)

Troubleshooting electrical systems
When defects occur in the electrical system, it is very important to act systematically. This applies to both checking for a burnt-out lamp and for non-working electric...

Checking the lighting lamps
Remove the lamp and check that the filament is intact and that the lamp fits tightly on the base. If the lamp burns out, replace it. If the lamp is normal, then do the...

Checking electric motors
In modern cars, many additional functions are performed by small electric motors. These include window lift drives, sunroof drives, electric central locking or electric...

Checking the operation of switches
Most electrical consumers are switched on and off using manually operated switches. In addition, there are also switches that operate automatically. Such switches...

Checking the relay
Many circuits contain relays that act as switches. Example: When the high beam is turned on manually by the switch, a signal is sent to the relay, and it supplies...

Checking the windshield wiper motor
The windshield wiper motor is located in a groove under the windshield. To check it, you need to remove the cover. Contact designation The contact designations on the...

Checking the direction indicators
The intermittent operation of the direction indicators and hazard warning lights is provided by the direction indicator relay. The alarm system is connected to a relay...

Checking the brake light
If the brake light does not come on, you should first check the fuse in the fuse box. If the fuse is good, check the brake light bulbs and replace them if necessary. If...

Checking the rear window heating
When the rear window heating is turned on, the section with the heating threads should become free of ice and dew after a while. If there is a malfunction, you must...

Removal, installation and checking the horn
The horn is located behind the front bumper on the left side. Removal Raise and support the car in front on the left. Remove the wire (1) from the signal (2). Unscrew...

Electronic immobilizer
The car is equipped with an electronic immobilizer, also called PATS, as standard (Passive Anti/Theft System or passive anti-theft system). When operating, the system...

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More sections on repairs of other Mazda models

• General information: Troubleshooting Mazda Capella 3 (1982-1992, petrol)
• User manual: Faults en route Mazda3 BK (2003-2009)
• User manual: Faults en route Mazda6 GG (2002-2008)

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