Opel Astra 1.6 - 95: Battery Charging Lamp On, Voltage Over 15V - Delco Remy GM Alternator Issue?

Question

Hello, I have a problem, the battery charging lamp on the alternator is on, the voltage is about 15 V and the battery is similar (low speed) with the load on the lights and increasing the speed, the voltage on the battery increases to about 16.5 V. What can it be? I changed the voltage regulator...

Zbysław · Answer

Damaged diodes should not raise the voltage.
Are you sure of the gauge?
Check the connections of the alternator-battery cables, with insecure contact, the voltage may increase.
In order for the lamp to go out, the positive voltage must be the same on both sides (from the excitation diodes and from the positive diodes).
The symptoms indicate that the excitation LEDs are working, but no voltage is reaching the lamp. Check the wires, contacts (corrosion, oxidation).

axxx · Answer

Oh, Zbyslaw, something wrong, the lighting of the indicator means no charging,
and you are overcharged, and the light is on.
If the voltage is too high and the charging current is too high, the electrolyte will boil and the water will evaporate. Is your battery not short-circuited?

Zbysław · Answer

The indicator light is not a good test of charging, it may not light up both when the alternator voltage is too low and too high, it may also light when the voltage is not being charged and when the voltage is too high.

I do not know if you understood correctly, the indicator does not indicate how the altenator is working, it only informs that the alternator produces some sem (if it goes out).

axxx · Answer

The indicator light is on when there is no charging, in other situations it may light up depending on the engine speed. In your situation, the regulator is definitely to blame because it is responsible for maintaining the appropriate voltage. One more thing, which measuring device did you use?

michal75 · Answer

As for the meter, I am sure that it is good (I had it from the electrician and he himself measured all the things with the alternator removed - he checked the diodes - but tomorrow he will take them and take them out of the alternator and check them once more), I check the wires, of course, but I've already watched them and it looks ok

Zbysław · Answer

to axxx and Michala is supercharged and the light is on, what's your colleague?

michal75 · Answer

As for the battery, so far it works, it is a self-service bosch and even has a green dot, that is, everything is ok, and on this lit lamp from charging I drove about 150 km because it happened to me on the road, at least I think so, but I certainly did 150

michal75 · Answer

as for the siwecenia the indicator is so that when starting the engine and working at low speed, it blinks a little and does not shine too much, but when I turn on the switch or raise the speed, I give it normally - it lights up, I replaced the regulator with a new one, but the effect was there, so I put it back in old because why pay PLN 100 for it (it cost so much), and the meter was a standard multifunction A, V, etc., I do not know the details

Zbysław · Answer

I do not recommend driving with such a high voltage in the installation, there are irreversible changes in the battery, you shorten the life of the bulbs, and the worst thing is that some electronics may fail.

Was the second regulator really good?

If the alternator-battery cable is OK (unscrew, clean, lubricate, twist - also the clamp), then the damage should be in the regulator or its vicinity (e.g. no mass on it).

When the voltage is too high, the regulator cuts the excitation current from the rotor and connects the second brush also to the ground (the rotor then has only residual magnetism and the voltage drops).

Staszek z Chełma · Answer

There is another possibility that the voltage regulator contacts badly, it reads that the voltage is too low and gives the excitation current to the maximum.

michcio997 · Answer

rather you do not have walnieta one diode it will be felt when you streak and the lights shine brighter on the doormat moves faster costs PLN 120 3 dioty + regulator it is recommended to replace this and that + buckets, preferably

Opel Astra 1.6 - 95: Battery Charging Lamp On, Voltage Over 15V - Delco Remy GM Alternator Issue?

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