How to check the diode bridge generator

Semiconductor–diode used in those parts of the circuits which is necessary to pass current in one direction only, excluding the back passage. Therefore, a defective diode or do not pass current through itself, or passes him in both directions. That is absolutely unacceptable in the conditions of normal operation of the automobile generator, the construction of which is included a diode bridge.

You will need

- ohmmeter,
- indicator light
- insulated wire – 1 m.

Instruction

In cases of malfunctions related to the production of the generator the charging current, diagnostic checks, among other things, the operation of the diode bridge.

To perform this check, without removing the generator, enough to power off the on-Board network from the battery.

Diode test to determine their short-circuit begins with a voltage supply with pigtail attached at one end to the positive battery terminal and the other to the generator to terminal "30". The control light is switched between the generator housing to the negative terminal of the battery.

If the test light is on, it indicates a short circuit diode, therefore, the generator must be removed from the engine for execution of repair, which reduces to the replacement of the diodes separately, or the diode bridge as a whole.

Note

For this there is a diode bridge, which is located at the rear of the generator. Diode - a device with two terminals that allows electrical flow to flow through it in one direction. The diode bridge usually has nine or eleven diodes (three additional).

Useful advice

In order to prevent bridging of the aluminum heat sink plate is covered fully or partially by a layer of insulating material. The terminals of the windings of the stator are welded/soldered or fixed screw connection to the mounting pads of the rectifier Assembly of the generator. How to check the diode bridge of the generator.

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