2. To make sure the lamp is working properly, do the following: connect the positive wire (+) and the negative wire (-) directly to the terminals of the battery and connect to the lamp. It does not matter how the wires are connected to the lamp. One cable to the contact, the second to the lamp body. If the lamp does not light, replace it.
Attention! It is necessary to make sure that the contacts on the lamp and the lamp frame are not dirty. If necessary, clean dirty contacts, straighten bent ones.
3. If the lamp is in good condition, install and turn on. If the lamp does not light, check the current supply with a test lamp. To do this, attach the test lamp to the ground. This means: that one end of the test lamp cable must be connected to the engine ground (pure metal) or directly to the negative pole of the battery. The second wire (+) or to the conductive plug or cable. If the test lamp lights up, but the lamp being tested does not, then there is a break in the ground wire of the lamp. To check this, attach an additional ground wire to the lamp frame. Now the lamp should light.
Attention! There are lamps that have only one current-carrying conductor, such as parking lights, interior lighting. These lamps are directly connected to the vehicle's ground.
4. If there is no voltage in the lamp's power supply cable, the indicator lamp will not light. In this case, the switch is most likely faulty. Check the switch.
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