Additional electrical equipment (VAZ-2101)

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Heater electric motor

Technical specifications:

• Nominal voltage, V — 12
• Nominal power, W — 20
• Rotation speed of the anchor shaft with impeller at rated power, rpm - 3000
• Current consumption at rated power, A — 6 (4.5*)
• Low speed of rotation of the anchor shaft with impeller, rpm - 2200
• Current consumption at 2200 rpm of the anchor shaft, A — 4.5 (2.7*)

(The information is posted on the portal: VAZBOOK.ru)

* For electric motor ME-255.

The heater of Zhiguli cars uses an electric motor of the ME-240 or ME-255 type. The ME-255 electric motor is unified with the ME-241 windshield wiper electric motor and is therefore not described here. The ME-240 electric motor is a two-pole, two-brush DC motor with series excitation. The electric motor has two rotation speeds: 3000 and 2200 rpm. A lower speed is ensured by including an additional resistor SE-328 in its power supply circuit.

The electric motor consists of a housing 6, two covers 5 and 13 and an anchor 8. The stator core 7, assembled from steel plates, is cast into the housing, cast from an aluminum alloy. The plates have a special shape and when assembled form a cylinder with two poles, on which the stator winding 14 is placed. A getinax crossbar 1 with brush holders is clamped between the lower cover 5 and the housing.

The anchor has a core made of electrical steel plates. The wave winding is placed in the grooves of the core, insulated with cardboard, the terminals of which are soldered to the copper plates of the collector. The collector is pressed onto the lower end of the shaft, and a plastic impeller is installed on the upper (output) end.


The anchor shaft rotates in two metal-ceramic inserts 11, which are held by spring washers, stamped in the covers. The outer spherical surface of the inserts is surrounded by felt rings. The inserts and felt are impregnated with oil.

The axial free play of the anchor shaft is adjusted by selecting washers 10. It should be within 0.1–0.5 mm.

Additional resistor of the heater electric motor

The resistor type SE-328 is designed for inclusion in the power supply circuit of the heater electric motor in order to reduce the rotation frequency of its anchor. The resistor is fastened with two screws in the heater fan casing.

The resistance value of the resistor is 1 Ohm at 20°C.

Heater Motor Switch

On VAZ-2101 and VAZ-2102 cars, switches of the VK-408 type are used to turn on the heater electric motor and change its operating mode, and on the VAZ-2103 - VK-408A. These switches have the same design and differ only in that the VK-408A key 15 is chromed.

The switch is secured in the opening of the instrument panel trim with spring holders 17.

The switch has a plastic housing 21, made up of two halves, between which three plugs are clamped. One of the plugs is copper-plated. A blue wire with a black stripe from the heater electric motor should be connected to it. The switch should be installed on the car so that the copper-plated plug is at the top. The middle plug is in constant connection with the movable contact 18.

Cigarette lighter

The "Zhiguli" cars use a PT-10 cigarette lighter. It is mounted on a bracket under the instrument panel. The bracket is clamped with nut 31 between housing 39 and light-diffusing rim 26.

On the back side of the cigarette lighter socket, a ceramic insulator 32 with a bimetallic spring clamp 30 is secured with a nut 33. On the front side, a glass with a heating element is inserted into the socket.

The heating element is a spiral made of a special alloy and is attached to a ceramic insulator 36, which is rigidly connected to a plastic handle 25 through an internal cup 37. One end of the spiral is connected to the cup 35, and the other to a finger, which rivets the cup and internal cup 37 to the insulator.

When the handle 25 is pressed, the cup 35 is clamped between the tabs of the bimetallic clamp 30 and held in this position. Current from the current source is supplied to the bimetallic clamp and is shorted to ground through the cup 35, the heating element, the finger, the inner cup and the contact ring. The heating element heats up, the bimetallic clamp also heats up and its tabs diverge, releasing the cup 35. Under the action of the spring 38, the heating element, and together with it the handle, return to their original position, signaling that the cigarette lighter is ready for use.

Fan motor

Technical specifications:

• Nominal voltage, V — 12
• Nominal power, W — 150 (110*)
• Rotation speed of the anchor shaft with impeller at rated power, rpm - 2700
• Current consumption at rated power, A — 15 (14*)

* For electric motor ME-272.

On some VAZ-2103 cars, an electric motor of the ME-271 or ME-272 type is installed to drive the engine cooling system fan. It is a four-pole, four-brush DC electric motor with excitation from permanent magnets.

The ME-271 electric motor has a stamped steel housing 6, inside which four permanent magnets 45 are glued, which are the stator poles. On the front side, two ball bearings of the anchor shaft are placed in the housing. The outer races of the bearings are expanded by spring disk washers 49. Grease is placed between the bearings during assembly. On the rear side, the housing is closed by a cover 13.

The hub 43, cast from an aluminum alloy, is pressed onto the steel shaft 53 of the anchor. The core 47 of the anchor, assembled from plates of electrical steel, is cast onto the hub. The winding 46 of the anchor is laid in the grooves of the core, insulated with cardboard. The collector 3 is pressed onto the shaft of the anchor from the rear side.

A getinax crossbar 1 with four brush holders and four electrographite brushes is riveted to cover 13.

The ME-272 electric motor has a housing 6 and a cover 13 cast from aluminum alloy, connected by tie bolts. A brush holder with four brushes is attached to the cover from the rear side.

The front bearing of the anchor shaft is a ball bearing, and the rear one is made of a metal-ceramic insert 11.

The electric motor is switched on by sensor 65 (TM-108) via relay 63, which is a relay of the RS-527 type, described on the sheet "Switches and relays for lighting and light signaling lamps". The armature winding of the electric motor is protected by a separate fuse 64 for 16 or 25 A.

Fan motor switch sensor

To turn on and off the electric motor of the engine cooling system fan on VAZ-2103 vehicles depending on the temperature of the coolant, a TM-108 sensor is used, installed on the left side of the lower radiator tank.

In the brass body 39 of the sensor, the plastic plug holder and the guide 41 of the pusher 19 are rolled. A spring plate 40 with a movable contact is riveted to one of the plugs. A bimetallic washer 42 is installed on the bottom of the body, at a temperature below 87°C it is bent towards the bottom of the body. The plastic pusher 19 rests against the center of the washer. At a temperature of 92°C and above, the washer is bent towards the pusher, which, in turn, presses on the plate 40 and the sensor contacts close.