Cause | Elimination Method |
Electric motor not working | |
Damaged wires or oxidized wire connections | Check and repair connections. Replace damaged wires |
Blown fuse 2 in the fuse box | Replace fuse |
Heater switch damaged - no voltage applied to switch output terminals | Check switch, replace if necessary |
Hanging or wear of the motor brushes, a break in the armature winding or contamination of the collector | Check motor, repair or replace |
Short circuit to ground of the armature winding - when the motor is turned on, the fuse burns out | Replace motor |
Motor only runs at one speed | |
Damaged wires or oxidized wire connections | Replace damaged wires, clean wire ends |
Damaged heater switch | Replace Switch |
Auxiliary resistor burnt out | Replace resistor |
Motor armature rotates slowly | |
Collector contamination or oxidation, brush wear | Clean manifold, replace brushes |
Interturn short circuit in the armature winding | Replace motor |
Seizure of the armature shaft in the bearings | Disassemble the motor, clean the shaft journals |
Instrument fuse keeps blowing | |
Broken device protection diode | Replace damaged diode |
The pointer of the coolant temperature gauge is constantly at the beginning of the scale | |
Device damaged | Replace instrument or instrument cluster |
Device sensor defective | Replace sensor |
Damaged wires or oxidized terminals | Check wires, repair connections |
Loose fixing nuts | Tighten nuts |
The arrow of the coolant temperature gauge is constantly in the red zone | |
Device damaged | Replace instrument or instrument cluster |
Device sensor defective | Replace sensor |
The wire going to the sensor is shorted to ground | Check, repair short circuit |
Loose fixing nuts | Tighten nuts |
The arrow of the fuel gauge is constantly at the beginning of the scale | |
Device damaged | Replace instrument or instrument cluster |
Damaged wires or oxidized terminals | Check wires, repair connections |
Damaged sensor: | |
- breakage of the flexible bus of the sensor; | – solder the tire or replace the sensor; |
- breakage of the resistor winding; | – replace the sensor; |
- weak contact of the current collector of the resistor; | - bend the contact; |
- leaky float | - replace the float |
Loose fixing nuts | Tighten nuts |
The arrow of the fuel gauge is constantly at the end of the scale | |
Device damaged | Replace device |
The flexible bus of the sensor is closed with the fuel intake tube | Bend the tire |
Sensor connection wire shorted to ground | Check, repair short circuit |
Loose fixing nuts | Tighten nuts |
The arrow of the fuel gauge returns to the beginning of the scale when the tank is full | |
Float limiter set incorrectly (resistor winding ends) | Bend the stopper 1-2mm down |
The needle of the fuel gauge moves in jumps and often falls to the top of the scale | |
Weak touch of the sensor resistor by the current collector | Bend the Current Collector |
Breakage of the winding of the sensor resistor | Replace sensor |
The fuel reserve warning lamp is constantly on | |
Sensor wire short to ground | Check, repair short circuit |
Short circuit of the flexible bus of the sensor with the fuel intake tube | Bend the tire |
Any indicator lamps do not work | |
Bulb burnt out | Replace lamp |
Poor contact of the lamp in the socket or the socket with the printed circuit board | Restore contact |
Sensor contacts oxidized | Clean the sensor contacts |
Faulty lamp sensor | Replace sensor |
Breakage in the wires, oxidation of the wire ends | Replace damaged wires, clean lugs |
The oil pressure warning lamp is on permanently or goes out only at high engine speeds | |
Low oil pressure | Check engine |
Sensor wire short to ground | Check, repair short circuit |
Faulty sensor | Replace sensor |
The parking brake warning lamp does not flash (constantly on) | |
Break in the winding of the relay-breaker (no continuity between plugs «–» and «+») | Replace breaker relay |
Break in the wire connecting the plug «–» relay-breaker with plug «I» fuse box | Check, replace damaged wire |
Speedometer not working | |
The nuts for fastening the tips of the flexible shaft of the speedometer drive are not tightened | Check, tighten the nuts |
Drive flexible shaft break | Replace Flex Shaft |
Damaged speedometer mechanism | Replace speedometer or instrument cluster |
Speedometer flexible shaft noise | |
Drive flexible shaft shell deformed (dents, kinks, etc.) | Replace Flex Shaft |
Mounting of the flexible shaft is made with bending radii less than 100 mm | Correct the installation of the flexible shaft |