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Inside the alternator, some are easily replaced and some are soldered in place.
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∙ 11y ago
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What does an alternator diode rectifier do?
The alternator diode rectifier converts the AC current being produced by the alternator to DC from which most of the electronics installed and battery use.
Can an alternator be directly wired to a battery?
Yes, as long as the diode in the alternator has not been removed. Alternator products AC, the diode switched it to DC which is used to charge batteries.
Can you replace alternator diode?
yes
Can an alternator on a Renault Megane with a shorted diode still charge the battery?
It depends on which diode, but sometimes it can.
What causes alternator failure?
Bearings can fail or a diode can burn out. Age is the enemy of an alternator.
Is a diode part of an alternator or the car?
There is a three phase diode bridge in a vehicles alternator. The voltage is generated as three phase AC. The diode bridge converts the AC voltage to DC voltage. This is the DC voltage that is used to charge the battery of the vehicle and run the vehicles electrical systems and equipment.
What device changes ac to dc in an alternator?
diode
Why would the battery light stay on while the vehicle is shut off?
I would suggest that the diode bank in the alternator has failed.... Would suggest that you have the alternator services (in UK tis about £30 I would suggest that the diode bank in the alternator has failed.... Would suggest that you have the alternator services (in UK tis about £30
What wrong when battery lights blinks?
The diode in the alternator is probley going bad, Check charging system. And replace alternator.
Your car dies when you disconnect your battery what charging could you be having?
This could also be alternator problems as in a bad diode in the alternator.
How do you check the alternator diode?
If the car is running do an AC voltage drop test from the positive on the alternator to the positive battery terminal. there should be less than 0.1v ac. if there is greater than 0.1v that would indicate a failed diode. Another way is to remove the alternator from the vehicle and disassemble it, exposing the diode trio. Using a multimeter on the diode setting, test for continuity on each side of each diode. Continuity should be detected only one way on each diode. If this is not the case on any of the 3 diodes, then the diodes have failed and are in need of replacement.
What will cause an alternator to undercharge?
It is defective. More than likely a diode it burnt out.
