I note: you simply can’t take and put the wipers relay 2108 on the “classic” - there are a lot of inconsistencies.
We have done so. The switching unit on the wipers 'classics' electric motor (photo 1) was re-soldered, taking into account the fact that in the initial position of the brushes contacts 3 and 4 (Fig. 1) should be open. Contact 1 (shown by an arrow) is superfluous for our venture - we immediately isolate its soldered wire (green). Now look at the right side of fig. 1, in order to understand how, using an additional five-pin relay and a soldered unit, it is possible to simulate the operation of an electric motor 2108 on the “classic”, the disconnector of which the executive group of such a relay fully corresponds. Contact 85 of the new relay will be (through the connection block - more on that below) connected to contact 4 on the electric motor, as can be seen in the final circuit in Fig. five.
All other operations are carried out in the cabin. Removing the instrument panel, we get access to the connectors of the steering column switch. In photo 2, this is pos. 6 - six-pin connector shown by an arrow on the right side of the picture. Now take out the standard wipers relay - it is under the pad at the bottom of the left front pillar. The connector released from the relay (Fig. 2), together with the bundle of wires, should be raised higher for the convenience of subsequent work. From this connector we remove the wire with pin 4. We will need it in another place - in the future it will be connected to pin 2 of the wiper motors (see A in Fig. 5).
Next step. The wire going from the wipers electric motor breaker to pin 3 of the connector remaining from the standard relay (see Fig. 2) must be switched (via the prepared counterpart) with pin 85 of our additional relay. As a result of reconnection (B in Fig. 5), contact 85 receives communication with contact 4 of the electric motor. Contact 86 receives a "plus" from the ignition.
To solve this problem, you will need to buy the "eighth" wiper relay. It will go into the subassembly shown in fig. 3 and in photo 2. To the wiper relay connector 2108 (item 3 in photo 2), a six-pin (with “mother” terminals) connector of the “Zhiguli” steering column switch (Fig. 4) fits almost one to one - see pos. 2 in photo 2. The connector block remaining from the standard wipers relay (pos. 1), with four contacts, is involved in the same subassembly. She migrated from the rack to the dashboard. A bundle of wires that used to go to the bottom of the rack, pulled up. Now, on pin 4 of this connector, when the washer is turned on, a “plus” will be applied, which will provide several brush strokes.
First of all, we will modify the connector (pos. 6 in photo 2) of the steering column switch (on the harness coming from the passenger compartment under the hood). It is the same as the “eighth” relay in fig. 4. After removing the wires with pins 4, 5 and 6 from the switch connector and combining them, connect to the wire previously removed from the four-pin connector - see A in Fig. 5. Thereby, we compose the motor supply circuit.
The inclusion of the washer must be organized differently - the standard scheme (with control by "minus") is no longer suitable. We connect one wire of the pump motor to the negative. The second one goes to the salon - to the two-pin washer connector (item 5 in photo 2) under the instrument panel. One of these two contacts should receive a “plus” of ignition, the other must be connected with an additional wire to the motor, as well as 4 blocks from the previous relay (Fig. 3) with the familiar contact. In the schematic diagram (Fig. 5), this is the circuit connecting the “+” of the washer motor with the contact 86 of the “eighth” relay, and in photo 2 there is a light blue wire. Now, when applying a “plus” to pin 4, the washer will work, and the wipers will make three to four strokes. Check this.