Relais / Module / Electronic box

Relays, modules and electronic boxes for car without license

The relay, modules and electronic boxes are essential for the proper functioning of a car-free car. These components ensure the correct distribution of electricity in the vehicle, command the different organs (headlights, paper towels-Ice cream, heating, starter motor ...) and protect the entire electrical circuit. Well chosen and well maintained, they avoid many failures and prolong the life of the electrical installation.

Role of relay, modules and electronic boxes

The relays act as electrically controlled switches, allowing to control high power circuits with a low current. Electronic modules and housings manage more complex functions, such as preheating, injection or engine management. They receive signals from different sensors and send specific orders to the actuators.

Relay: smart switches

• Command power circuits (starter, fire, fan).
• Extend the life of the dashboard switches.
• Allow to use finer cables in the passenger compartment.
• Limits the heating in the electric beam.
• Improve the general reliability of the system.

Electronic modules and boxes

• Manage the motor functions (preheating, injection, regulation).
• Centralize sensor information for optimal operation.
• Allow an accurate diagnosis in case of failure.
• offer integrated coverage against overvoltages.
• Optimize power consumption and reduce faults.

Signs of failure of a relay or module

Quickly detect a relay or a faulty housing avoids immobilizing failure. Several symptoms can alert:

Electrical symptoms

• Headlights or lights that do not light up.
• Inactive starter despite a battery in good condition.
• Fuses that jump frequently.
• Malfunction of an accessory (fan, defrost, paper towel-ice).
• "Click" noise absent when activating a circuit.

Electronic symptoms

• Dashboard indicators that remain on permanently.
• Loss of engine power or-shots.
• Difficulties at cold weather start (preheating module).
• Irregular behavior of lighting or ventilation.
• Error message or default code detected during a diagnosis.

Diagnosis and control before replacement

Before replacing a relay or module, it is recommended to perform some simple checks. This avoids changing a part unnecessarily and identify the true origin of the problem.

Diagnostic steps

• Visually check the state of the relay or housing (corrosion, traces of burn).
• Check electrical continuity with a multimeter.
• Check the current arrival and mass.
• Provisionally replace the relay by an identical model for testing.
• Check the status of fuses Associated.

Preventive maintenance

• Clean the electrical connectors regularly to prevent oxidation.
• Protect housings against moisture and water splashes.
• Avoid electrical overloads (addition of unplanned accessories).
• Immediately replace any grilled fuse and look for the cause.
• Check the correct tightening of the masses and connections.

Replacement of a relay or module

Replacing a relay or module is usually simple, but it must be done correctly to ensure reliable operation.

Precautions before assembly

• Disconnect the battery to prevent short-Circuit.
• Identify the relay or faulty module thanks to the electrical diagram.
• Check that the new piece has the same characteristics (amperage, pinout).
• Clean the mounting area before inserting the new part.
• Go back and test the circuit.

Test after replacement

• Check that the controlled element (fire, starter, fan ...) works normally.
• Check that no fuse jumps after installation.
• Check that the abnormal lights of the dashboard are extinguished.
• Start the car and observe the general behavior of the circuit.
• Perform a short trip to confirm the reliability of the repair.

Catalog Pro VSP : Relays, modules and boxes for car without license

Pro VSP offers a wide choice of relay, modules and electronic boxes For all cars without a license. The rooms are selected for their quality, reliability and compatibility with the majority of market vehicles. You will easily find the reference adapted to your need thanks to detailed filters and descriptions.

Complementary parts recommended

When replacing a relay or module, it is often wise to check the entire electrical circuit and fuses. Find our complete selection here: Fuses for car without a license.

Budget & Related Costs

The price of a relay or module varies depending on the function and complexity of the room. Simple relays are generally affordable, while more complex electronic boxes (preheating module, engine management) are more expensive. A good diagnosis avoids unnecessary replacements.

Typical expenses

• Individual relay for starter, fire or ventilation.
• Electronic preheating module or engine management.
• Centralized control box.
• Hand-Workshop if need for advanced diagnosis.
• Check and replace associated fuses.

Tips for extending the life of relays and modules

• Maintain the electric beam in good condition and protected from moisture.
• Clean the connectors during regular interviews.
• Avoid electrical overload caused by non-certified accessories.
• Monitor warming signs (hot plastic smell, slam relay).
• Immediately replace any failing piece to protect the rest of the circuit.

Also find our community on our forum Avenir VSP !