alternator

  1. K

    Can I charge my caravan battery from my car alternator with a DC to DC while idling?

    Can I charge my caravan battery from my car alternator with a DC to DC while idling?
  2. D

    Can an alternator be tested for output off a car?

    Hi, I'm building a kit car. I have an alternator with no idea what Amp output it is. Is there a way of testing it with it not installed on a car?
  3. 7

    Request advice regarding sourcing for brushes for Honda CRV alternator

    I'd like to refurbish the alternator for a 2005 CR-V. My plan is to replace the front bearing (the one closest to the alternator pulley) since that's the one that has the most stress applied, and also replace the two brushes. Honda sells the brushes, but they are almost $100 for the pair! The...
  4. A

    Did i fry my alternator?

    I have a 1986 diesel van. I (foolishly i now believe) upgraded to a 150amp alternator. Recently, i was driving and when I turned the van of, it wouldn’t start again. I realized that the positive battery cable had come disconnected so that the van was running off the alternator, for...
  5. B

    Mercedes GLC 2016 no charge

    Hello, i have a problem with mercedes glc 250 cdi 2016 it drained my battery once and when i tested it with multimeter i found it is not charging battery. I first changed voltage regulator then the whole alternator then the agm battery and still no charge, there is 0 trouble codes in ECU or SAM...
  6. P

    Three Batteries have Died in 11 Months Alternator Appears OK.

    Vhicle: Fiat Grande Punto 1.2 Petrol. 24/9/2021 The original battery died and was replaced: I'll put that down to old age. It was replaced with a Lion brand 40 AH that I was later told was not the recommeded battery for the vehicle. A month later the Alternator Sized Up and was replaced...
  7. N

    Alternator or battery

    I have a 2008 Mercedes c200 which is dead in the driveway. It starts perfect and quick when jumped but does immediately after being switched off (doesn't turn back on unless jumped). I tested the voltage with a multimeter and got the following Stress no accessories 1.5rpm 13.77 Stress with...
  8. B

    Alternator Electrical Query

    Hi, When testing the diode on a car alternator all the tutorials state place a multimeter to diode setting, place the + cable to the casing and the - cable to the battery post ( B post) and you should get a reading of .5v to .8v. Swap the cable positions i.e. the - cable to the casing and the...
  9. K

    Alternator only putting out 12.3 v after Tachgraph fitted ?

    As the Title, After the tachgraph was fitted it throw up a power interuption warning on the tacho and has done a few times since , The alternator is only showing 12.3 v when testing on the running vehicle , Lights dipping when clutch pressed on dash and exterior headlights etc for a second or 2...
  10. G

    2004 Citreon C4 Alternator L/DFM wire causing parasitic draw.

    I've been having a problem with my car's battery draining overnight, I narrowed it down to the L/DRM wire of my alternator, It draws 80 milliamps while the key is off, I unplugged it overnight and it didn't drain the battery. Now I don't know why this would happen. Is it the alternator? or...
  11. 6

    https://www.66autocolor.com/house-of-kolor-orange-car-paint-s/3604.htm

    I have 2:30 amp relays running the door poppers for my shaved door handles. They only seem to work properly when the Vehicle is running. Is this an alternator a battery relay or perhaps a wiring problem?
  12. H

    Alternator failing to produce power until revs rise

    Hi people . My first post . I have a 1989 turbo diesel Landcruiser with a 24 volt system . The alternator , for many years has needed to be spun up before it began to produce power and the dash lights extinguished . About 1250 engine rpm or three times that for the alternator . Recently it would...
  13. D

    Alternator use for micro hydro

    Hey. I'm setting up a micro hydro system and thought some guidance would be nice to avoid unnecessary experimentation. This is my first version but the idea is to use the water to push a pelton wheel to turn an alternator. However with this first test i am only reading about 2 volts off the...
  14. S

    Alternator Rectifier

    Hello, Does anyone know what the effect would be of replacing a delta wired diode pack/rectifier with a star wired one? Any advise would be awesome. Many Thanks, Alan.
  15. S

    Do I need an inline fuse between my alternator and battery isolator?

    I purchased a 95 amp battery isolator and my alternator pushes 95 amps but I'm assuming that it may spike above that occasionally. Should I put a fuse between the two? I am only aware of 100 amp maxi fuses would that save the isolator for damage or do I need to purchase a battery isolator rated...
  16. T

    Unidentified issue

    Hi Everyone, I am struggling with a problem for what i cannot find any solution. I have an Opel Astra H 1.3 CDTI form 2008 and started to have some issues for a while. The situation is the following: My battery died on a morning, it was strange since the battery is only 3 months old. I took it...
  17. R

    Dc electric

    Automotive electrical issue here. I recently replaced the alternator in my truck, and whenever I ground the alternator to the battery the battery shows 0 volts. What could be the issue?
  18. A

    Alternator wiring

    I am changing the alternator on an old tractor. The old alternator has one D+ terminal that receives power only when the key is on. The new alternator I am retrofitting has an S (sensor) and L (lamp?) terminal. From what I can understand, the wiring for the new alternator is as such; S terminal...
  19. T

    Toyota 2H alternator output

    Hi I’ve got a 1985 HJ75 Toyota Landcruiser with a 2H 4.0 diesel. I’m having problems with either the alternator or the external regulator. Can anyone please help me with what the output should be at the alternator and also the output at the regulator? Both the alternator and regulator are new...
  20. J

    Using an alternator to run a motor

    Hello there.- I have a 550W 3ph electric motor / pump and a VFD which is a 220VAC input to 220VDC which is connected to my motor, so my motor can start at a lower speed until reach 1,390 rpm, also I have a 12VDC to 230VAC pure sine 1000W inverter, my question is: If I use a car alternator that...

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