1. Prepare the vehicle for operations (see "Preparing a car for maintenance and repair").
The arrangement of lamps in the sections of the rear light of the VAZ-2104: 1 - side light bulb type A12-4-l (T4W); 2 - fog light bulb A12-21-3 (P21W); 3 - direction indicator lamp A12-21-3 (P21W); 4 - spring retainer of the lantern; 5 - Reverse light bulb A12-21-3 (P21W); 6 - brake light lamp A12-21-3 (P21W)
2. Disconnect the wire from the negative terminal of the battery (see "Battery - Removal and Installation").
3. With a socket wrench by 8 mm with a deep head and an extension from the luggage compartment through the holes in the body, unscrew the two nuts securing the rear light. The nuts are located in the cavity of the body so that they do not accidentally get lost, place a small amount of plastic grease or plasticine in the key hole.
4. Remove the light from the body opening, disengaging the spring clips that hold the light to the body.
5. Press the lock of the wire block and disconnect it from the contacts on the lamp board.
6. Using pliers or your hand, alternately squeeze the petals of the two clamps and remove the board from them.
(The text is on the website: VazBook.ru)
7. Disconnect the board with the lamps from the flashlight body.
8. Remove the faulty lamp by pushing it in and turning it counterclockwise.
Installation
1. Before installing the lamp and the board, wash and clean the contacts of the board, the lamp socket and the connector block of the wires from dirt and oxides.
2. Assembly and installation of the lantern is performed in the reverse order.