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Hey, Thanks for bad alternator and symptoms. Very helpful. Let me add you are reading the forward voltage drop across the diode (pair) with your multimeter. The meter puts current through the diode to display 0.54 volts forward and 0 volts reverse when the silicon power diode is good. Other types of diodes may show 0.3 volts but these are not used in the diode pack in the alternator. There are six of them, each pair to rectify each phase of the 3 phase AC produced by the Alternator. A bad diode shows up with voltage ripple on the usually flat output of the alternator. This can be seen with an oscilloscope or shown when the alternator output is low, weak charge, weak voltage. Normal regulated voltage in the car is 13.8 to 14.2 volts above 1000 RPM, not at idle. Less voltage is a bad alternator (diodes), more voltage, 16 volts is a bad voltage regulator. Too much? An under or over voltage/ charged battery will shorten the life of the battery.
Hello, congratulations, it's nice to see a problem resolved, I have a 325i 2010 N53 slows down unstable and shakes when cold, it lasts 1 minute and afterward the car runs very well. When she does that I accelerate slightly and that prevents the shaking and slows it down unstable, do you have any idea, said the vanos? No smoke, no smell of gasoline. New spark plug and coil. I'm French, sorry for the translation.
Hola siempre veo tus videos y me han funcionado pero tengo una fuga de batería que no he podido resolver aún. Si me puedes ayudar dime dónde te envío s detalles en video para que puedas saber exactamente cuál es la falla gracias.
Hey man, I keep hearing weird wirrrr sounds after it has turned off. Then when I go to turn on the car, SOMETIMES, their will be a one second delay with the same wirrr like when the car is off. I think my BMW E90 with LED Angel Eyes and Fog Lights. Would that be slowly draining after like a week at home?
I replaced new alternate and battery but my battery is still drawing. Come to know that my window motor is getting warm after I turned off the car. Is there anyway I can stop that?
Yeah remove the window relay and that relay is Frozen clothes so you need to replace it but I would pull it out even if you can't replace it right away cuz it could cause a fire
2015 BMW 428i Convertible trunk repeatedly opening and closing when trying to lock itself. Therefore, cannot operate hardtop. Any suggestions? Thank you!
Can you please help me I have 2015 bmw 328i 8040b0 ibs wake up line short circuit to ground code what does this mean? I had issues with it discharging battery bought new battery and registered it but have check engine light and this code please help thank you
Changed alternator on my 2009 528i lasted 1 month .changed again ,changed again alternator bad again burning up alternators ? On 3rd alt now machanic says may be bad Modual. Also batery drain after a couple day parked.
@@kadecorey1347 yes battery drain because radio has parasitic draw, I now have to pull the radio fuse every time I leave the car parked for a long time . also had new battery programed to the car. The dealer wanted $ 3000. For a radio. $ 500. To find the problem.
Help I have 2005 bmw 330i Yesterday I drove to store came out started up fine after driving a few minutes it lost all power and would not drive normal the rest way after parking it the car would not start the battery was dead after charging the battery it started fine so drove it to autopart store and they said the alternator was fine and battery was good I can't figure it out please help
#1 make sure your battery is registered to the car.... #2 on the negative terminal battery post intelligent charging fuse/cable may need replacing #3 relay # 15 and or # 30 may need replacing #4 check voltage regulator
Hey i am new to the bmw thing. my question is without the coding, would you be able to pair a new key to the car and for the car to start? or coding have to be done first for the car to recognize the fob to start? i can hear a click when i am trying to start the car?
My car was having electrical issues, a lot, and noticed that the battery kept draining overnight. Got a new battery and it is still draining overnight. I'm thinking it's the diodes like you stated in the video, but can I just replace the voltage regulator and not the whole alternator? Thanks!
