alternator 100211-6060 27060-50011，113085，1002116060，1002116350 ALN3085MQ,ALN3085US ALN3085RB，13384N 437826，2706050011 FOR LEXUS

• Preparation work: Ensure that the vehicle is turned off and disconnect the negative cable of the battery to prevent electric shock or circuit short - circuit during the installation process. Prepare appropriate tools such as wrenches, screwdrivers, and sockets.

• Remove relevant components: Take the Lexus GX470 as an example. It may be necessary to first remove the anti - skid plate at the front of the vehicle to better access the generator. In addition, components that obstruct the removal of the generator, such as the anti - roll bar and air - conditioning pipes, may also need to be removed.

• Remove the generator drive belt: Use the appropriate tool to loosen the belt tensioner and remove the belt from the generator pulley.

• Disconnect the electrical connections: Locate the wire plugs on the generator, carefully pull them out, and mark the position of each plug for correct installation later. For some Lexus models, it may also be necessary to remove the rubber cover on the generator, then loosen the connection nuts and remove the wires.

• Remove the old generator: Locate the bolts fixing the generator, usually there are two, upper and lower. Use a socket and wrench to loosen and remove them, and then take out the old generator from the engine compartment.

• Install the new generator: Place the new generator in the original installation position of the generator and initially fix it with the fixing bolts, but do not tighten them completely to facilitate subsequent position adjustment.

• Connect the electrical lines: According to the previously marked positions, correctly insert the wire plugs back onto the generator to ensure a firm connection.

• Install the drive belt: Install the drive belt onto the generator pulley and adjust the belt tensioner to make the belt have an appropriate tension.

• Install other components: If components such as the anti - roll bar and air - conditioning pipes were removed during the disassembly process, they need to be reinstalled in their original positions at this time.

• Reconnect the negative terminal of the battery: Reconnect the negative cable of the battery to the battery and tighten the fixing bolt.

• Inspection and testing: Start the vehicle and check whether the generator is working normally. This can be judged by observing whether the charging indicator light on the vehicle dashboard goes out and by using a multimeter to measure whether the voltage across the battery is within the normal range (generally 13.5V - 14.5V).

• Safety Operations

• Power Disconnection: Before installation, be sure to disconnect the negative cable of the vehicle battery to prevent electric shock or short - circuit during the operation, and avoid damaging the generator or other electrical equipment.

• Personal Protection: Wear insulated gloves and safety goggles to prevent electric shock and eye injuries. At the same time, since there may be high - temperature components in the engine compartment, when operating immediately after the vehicle is turned off, heat - resistant gloves should also be worn to prevent burns.

• Environmental Safety: The operation area should be kept dry and clean, away from flammable and explosive items, and prevent debris from entering the generator.

• Tool Use

  Use appropriate tools, such as wrenches, screwdrivers, and sockets of the corresponding specifications. For Lexus models, some bolts may require specific torque, so a torque wrench may also be needed to ensure that the bolts are tightened with the right force, avoiding damage to the bolt threads or deformation of components.

• Component Inspection and Installation

• Generator Model Matching: Ensure that the model and specifications of the replaced generator are completely matched with the vehicle. Otherwise, it may lead to improper installation or the generator not working properly.

• Appearance Inspection: Before installing the new generator, carefully check its appearance for damage, such as a cracked housing or loose terminals. If there are any problems, it should be replaced in time.

• Correct and Firm Wiring: When connecting the generator wires, follow the correct order and method. For example, usually the larger wire should be connected to the "B+" terminal, and other wires such as the charging indicator light wire and the magnetic field wire should be connected to the corresponding terminals, such as "D+", "F", etc. Ensure that each connection point is firm and reliable to prevent loose connections, which may cause poor contact, overheating, etc. At the same time, use insulating tape to wrap the exposed wire parts to do a good job of insulation.

• Standard Belt Installation: When installing or adjusting the drive belt, ensure that the belt is installed in the correct position and has the right tension. If the belt is too loose, it will cause the generator speed to be insufficient, affecting the power generation effect; if the belt is too tight, it will increase the load on the generator bearings and shorten the service life of the generator and the belt.

• Bolt Torque Control: When fixing the generator, tighten the fixing bolts according to the specified torque. The torque of the generator fixing bolts may be different for different models. If the bolts are tightened too tightly, it may damage the generator housing or cause component deformation; if they are tightened too loosely, the generator may vibrate during operation, affecting the power generation performance and even causing the generator to fall off.

• Post - installation Inspection

  After installation, reconnect the negative cable of the battery, and then start the vehicle. Observe whether the charging indicator light on the dashboard goes out after the engine starts. If the indicator light is still on, it may indicate a problem with the generator connection or a fault in the generator itself, and further inspection and troubleshooting are required.

References：The content in the text regarding the precautions for installing the 12V generator of Lexus is similar to some content on websites such as Qiche Dashi (Car Master) and Autohome. However, it cannot be definitively determined that it is sourced from these websites. These precautions may have been compiled by synthesizing content from various automotive repair manuals, professional repair materials, and relevant automotive knowledge platforms.