VW Audi Seat Skoda,alternator not charging diagnose and repair PART1

FOR ALL YOU'R CAR PART NEEDS: tidd.ly/3H0rz8G
Hello guys,
In todays video i ame going to show you how to repair audi/VW alternator,manufactured by bosh.
If the charging light is staying on in your vehicle in 99% of cases its a regulator problem,which can be changed very easily.

[@danyo1972]

Brilliant video this. Sorted my 140A Bosch alternator on my 2012 Skoda Octavia. Regulator €27, new alternator €270. Some saving. Thanks guys.

[@darkaether2798]

Fixed my Golf alternator thanks to this! I wasn’t confident that it would work, but I bought a voltage regulator anyway just to see. Getting the cover off in situ was a bit fiddly, due to the Philips screw right behind the oil filter, but was able to get it loose with a screwdriver bit in a very small ratchet spanner. The garage quoted me €570 to fit a new alternator, I fixed it for €30.

[@AJMcWHISKY]

Had absolutel no idea about this, alternator off, followed the instructions and discovered that the bushes on the regulator were very worn. cheers dude a great help and saved a bundle too!!

[@Paul-c01]

Thanks for taking the time to share your skills, I fixed my battery light on issue following your guide. Worked on MK5 Jetta 1.9 TDi 07 plate with 140A Bosch alternator, replaced regulator tah dah! You the man!

[@chrisbarrable5132]

Just a comment to say this is a brilliant piece of advice to change only the regulator/rectifier part. I was getting worried as all web info was that to change the alternator complete on my 2005 VW Passat TDI involves removing the whole of the front of the car. This video & advice has saved me loads of money & time. Thankyou.

[@davew4753]

Brilliant. I followed advice with Alternator still in car (Audi TT 225). Not easy to reach lowest Philips screw but possible with some patience and an offset screwdriver. Changed Voltage Regulator cost £31 and fixed my charging problem. Thank you so much.

[@yellowmellow4035]

Imagine a regulator that only costs $30 will end up costing $500. Thank you very much!

[@anthonythomas280]

THIS IS A MAN WHO KNOWS WHAT HE IS TALKING ABOUT I DID MY VW TDI 4 YEARS AGO THANKS MATE

[@peterodriguez4642]

Quick easy and straightforward, good tutorial!!

[@WestronicsIrl]

Hello mate, Thanks for a nice words. In these types you cant change brushes for 2 reasons, First is that where brushes are fused it's completely sealed with hard epoxy,it's very hard to get this stuff out. If you manage to get to the fuse points there is a disappointment there too,brushes are fused to the aluminium and as you know you cant solder copper to aluminium. Its much easier to just get a new regulator. Hope this helps.

[@readyforkylereddy1672]

Thank you for your assistance got mine sorted

[@WestronicsIrl]

Hello mate,i think due to a long time in stand still brushes might have got a bit corroded. And a bit of oxidization could have come to the slip rings. Loosen the engine belt,take the regulator of the alternator,it should be a bosh and its only 2 philips screws holding it. "flick" the brushes to free them,and spin the alternator by the pulley holding a bit of a sand paper to the slip rings,that should clean them,reinstall and try it then. I might make a video on the old type bosh shortly :D :D.

[@larslundin5498]

I just would like to say thanks for the illustration, but, IF you try to do it on the car it can be hard, I have a 1,6 TDI with AC, so... had to loosen the compressor and the big hose in front of the alternator to get to the screws and nuts, the nut on the right side is so thin that I had to grind down the spanner to make it fit, so it is a bigger job than I expected, thankful anyway about the KZbin videos! A big help! Took me two days...🤨

[@DogsOnAcid]

If you want to be carefull not to short the positive wire, can't you just disconnect the battery?

[@rogeronslow1498]

After 550 000km my Nissan alternator slip rings are still nowhere near as worn as the examples you showed. I wonder why?

[@gplusgplus2286]

Hello my friend. 120A alternator is charging but not enough. With engine on its 13.4V with no consumers and drops to 11.5-12.4V when turn on consumers (radio, lights, aircon). I have replaced regulator with Bosch blue genuine part, what may be wrong? EDIT: Maybe its the rectifier which is the part below the regulator?

[@WestronicsIrl]

Hello there,In some cars its easy to change regulator while the alternator is on the engine. Easiest way to see if it is possible is to simply open the bonnet and have a look where the alternator is situated.If there is an easy access to the back of the alternator you will more likely manage to change it.

[@rahimkamara6180]

So I’m have trouble with my 2013 Audi A6 the alternator is sometimes on and sometimes off and I’ve already replaced it

[@perforsberg1269]

This helped alot! As you said, i replaced the regulator and now it works💪

[@ItchyKneeSon]

Very Nice! I hope this is the problem with my parents' Winnebago Rialta based on the Eurovan.

[@laurencereynolds9570]

Ok great thanks - yep leads are definately the right way round. The battery needed replacing due to corrosion. Have taken it to get a new alternator anyway - cheers for the help if in future I need it!

[@WestronicsIrl]

Bolt i ame talking about is the power wire comming from the battery,but if you disconnect the battery itself you dont have to worry about it. But you can have a problem with the rectifier,often enough when changing the battery people fit the battery leads other way around. Even if you do it for a split second it can damage the rectifier,and it will cse the red light to come up on the dash. Hope this helps.

[@leer5858]

Thanks for this video. I just replaced my regulator with the alternator still on the car (VW Passat) because I couldn't remove it and you said it could be done. Was an easy job and fixed it.

[@mikewood3487]

Hi, I have just had this problem on my 2002 T4 2.5tdi multivan with a Bosch alternator. The only thing I will say is DO NOT BUY AFTER MARKET volt regulators, pay £40 exchange and get one from VW, the quality even in the appearance says it all, compared with the after market stuff. I was supplied with 2 off ebay, (TOPRAN) One was charging at well over 20volts which would have boiled the battery. It also cut out the entire dashboard, so buyer beware The 2nd one I was supplied with, the battery light still glowed dimly. After fitting a genuine part all systems go, so don't scrimp to save a few lousy quid. Thanks for the video, very helpful.

[@iulixxx]

This is great video.I have a question please...I have exactly the same alternator and is charging 13.8V at idle,but if I turn on all my consumers the charge drops to 12.7V. My battery is Varta Black 56A is quite small for the 1.8T engine.What do you think?Do I buy a new regulator?

[@spelunkerd]

That's a great video. I often wonder why the voltage reg is now routinely sold as a unit with a rebuilt alternator. It creates a market for a quick buck, where a retailer can buy a voltage reg for $22 and sell back the 'rebuilt' alternator to the next customer for $180. A generation ago these were two separate units, and so you tested and only replaced the bad part. The difficult part for the customer is to wait (with no car) while he finds the voltage reg and gets it mailed to him....

[@peltsa]

Thank you for great tutorial and quality video 🎉

[@steffennielsen3304]

Thank you very much for a nice, short and precise walk-through!

[@racerx5379]

Disconnect the battery prior to disassembely

[@jonathanschomer6853]

my alternator on 01 jetta gl 2.0 aeg motor is charging at 13.8v engine running, no accessories. I applied more engine throttle and voltage remained at 13.8v. When accessories and car idling, voltage drops to 12.6v. Will a new regulator improve this? I am guessing the charging system should be 14.2-14.7 volts.

[@hyppere]

Yes its the same battery, i didnt change the battery, just charged it. could the regulator be the problem?

[@bossi007]

Many thanks for such great videos. I have a problem with my VW golf IV 1.4 16V with Bosch alternator. When the weather is a bit cold, I can see my main lights flashing a bit, not continously. This only happen when engine is idling (850 rpm), when I increase revolutions to 1200 rpm they lightning normally. Yesterday I measure some voltages....when engine is off I get 12.96V, when iddling the voltage is changing between 14.13-14.28V, increasing the rpm it stay at 14.28V. What could be wrong?

[@francisc0]

good vid! In my 2007 year BWA tfsi engine the battery light came up, and the car switched off all electric equipment. I hope I can manage to replace the regulator without taking the alternator off.

[@danielfl.9347]

Thank you a lot, I hope that this is what is wrong with my car.

[@hibernianmelody6761]

Excellent video perfectly presented and lovely and clear communication. 👍🙏 Thank you

[@WestronicsIrl]

Hello mate, If the light is flashing on the dash it means you need to have a look in the alternator,its more then likely stuck brushes,is the battery you used new or is it the one that have been in it for last 3 years? If it is the old one you need to replace it,charging it is no good. 1) replace the battery,car should run longer than 5 min. with charged batt. 2) check the brushes,flashing light often means that brushes are stuck.

[@WestronicsIrl]

Hello mate,great you liked the video, First question,does the battery light comes on when ignition switch is on,and does it go off when engine starts? If it does,check the charge on the alternator terminal rather than on the battery,if you will get correct reading ie: over 14V,it means you have no contact from the alternator to the battery.But if the voltage is low you might have a worn pulley on the alternator. Let me know how did you got on mate.

[@claytona8962]

Pls make a video on changing brushes on this type of regulator

[@screwsnutsandbolts]

Great channel. subbed ! 👍🏻

[@lifebeginsat190]

great video...anyway you can check the regulator to make sure its faulty?

[@lusdenny]

Hi, in the copper ring collector how much is the diameter limit that then you are on the plastic? Thank you

[@jamesmajor1638]

Great video, very clear and worked for me!! However, the copper on my alternator shaft was very worn so I think the fix will be short lived. Can the shaft be refurbished?

[@konstantinvonderschulenbur7675]

Excellent vid! Its great that you have given up your time to make these videos! It has helped me a lot! I have a 1993 Audi 80 and it was not running for about 2 years. When I started it, the red battery light was flashing and it drained the battery. Is this something that can easily fixed?

[@benwilliams2135]

Warning.....the 2 retaining pozi screws are incredibly tight, a problem if doing in situ. I had to snap off regulator, mole grip 'rounded off' screws out, then hacksaw a groove in screws to make usable again for straight edge screwdriver.

[@fernandommc9828]

My VW started do show a red battery light when i start the car. The light off when i rev the engine above 2500 (more or less). Maybe a regulator problem, Many thanks for the video!

[@YooToobR34]

Thanks. Great video. My problem is getting TO the thing. On a 1.8T Audi A4 it's almost impossible. How they build these is a complete mystery! (SMOKE AND MIRRORS?)

[@josevizcarra9363]

Please could you tell me where is locate the alternator main fuse in Wv Passat V6 2003? ; thank you so much

[@benwilliams2135]

Ace vid!!! Is £40 the normal price to pay for a regulator? Cheers

[@MrOmgfreak]

great vid i just got a used altenator with 22 k miles on it

[@macydee]

This will give a few brownie point with my girlfriend for sure :) thanks

[@NapalmBBQ]

Gents, Great video! I'm about to attempt my first alternator replacement on my Audi B5 2.8. Is it likely that it is the regulator like in this video? A week ago as I was driving all my dash lights, radio, etc stopped and the car would only rough idle. When I jumped it, it started right up, but when I disconnected one of the jumper cables the car died immediately. To me this means the alternator is bad. I borrowed a battery charger, but the battery won't take a charge. I guess I need a new one

[@davidsnashall1913]

Hi - Great vid / advice Thanks - just one problem.... My 1.8T Skoda (2003) has a big problem - not charging at all (very low voltage reading when checked with auto multimeter & car running) put new 075 heavy duty battery on - it started fine until power used up then threw loads of MIL lights / ABS etc & car stopped running / new battery problem solved until falls below 12v etc - Despite no reading at terminals when running... theres NO warning light on dash, it goes out? Any advice please? Dave

[@billhanson827]

Awesome. You just saved me $100. Thank you!

[@WestronicsIrl]

Hello Mate, I think the alternator you have there is more likely to be internal type bosh, which i dont have any videos of them. Or it could also be a valeo,which you can find a video of on my chanel. And in valeos most of the time its only brushes that give trouble. Oh,and yes i think you do need a new battery :D. Cheers.

[@billyyoder8171]

I have a question for 2008 VW Passat alternator two terminal regulator. The question is about the W terminal. It is wired to the ECM. This is feedback monitor. Does the ECM supply the voltage to the regulator and the regulator toggles it to ground to create the duty cycle signal feedback?

[@basileok2222]

ALTERNATOR is the weakest and most expensive car generator, made only to oppose the high mechanical resistance it takes from the engine, which translates into fuel consumption. The stator winding is made in such a way as to output three-phase current on which a Expensive and bad diode bridge rectifies it by making it direct current. The efficiency of this shift is of maximum 53%. It consumes a lot, it produces little and it has many expensive components that go quickly to make the drivers for sale. This mess was made especially in the purpose of consuming more gasoline and to sell components that you do not find in the old dynamos. On this site you will find videos showing the old dynamos, used now in some countries, which had a dual role: starter and after it started the engine became a generator. The mechanical force it consumes from the engine was small, it was robust, without straightening axles and it burned hard. dynamo if instead of the aluminum housing in which the bendix is ​​located, a bearing cap is mounted in which to enter the rotor shaft. The stator coil must be decoupled from coal and coupled separately to become excitation coils controlled with the load relay. the rotor, the starter spins.If the sprocket of the bendix is ​​fixed on the shaft not to slip, then it will always remain on the crown of the flywheel, and after the engine has started the sprocket takes over the movement of the motor and reverses the rotor that will produce current by charging the battery. some old model cars, this was done with a transmission belt that came on the flywheel and on the starter - generator.With a single good, robust, reliable and high efficiency device, two maneuvers were performed. Now there are two components that do the same. maneuvers but with higher costs. Question: why? I wrote above. You can find other hidden motivations. Success.

[@Catalincoco7777]

Salut am un w passat b6 1.9 105cp imi poti spune ce serii au rulmenti la alternator valeo 12v 140 A Multumesc

[@Andrey-a-casa]

Hi. Good video. I heve a problem alt. not charging but battery indicator is off. Golf 4 1.6, alternator Bosch 90A.

[@nofeargtr3156]

thank you u just saved me a bunch of money

[@farzanarp]

G Ted did it work for you I was disabling on my Vw golf mk4 and I discover I don't have 15mm socket I will find socket

[@mudassar34]

Hi are the brushes replaceable on this type as I think mine is a sealed unit. The slip ring was all seized on too had to break it all off.

[@MrHotcress]

I have a 1999 jetta with the some alt. not charging and there's no battery light at all. Theres also one wire in the d shaped connector. There is no ref signal. Could a bad cluster cause the problem?

[@velimir1983]

Thank you

[@fixerman]

Is possible to change the brushes from this regulator??

[@sozekeysersoze]

You are my hero

[@alexattard3406]

Hi, I have an alternator draining my car battery after 3 days. When I disconnect battery after a drive, car starts with no problem even after a month (obviously reconnecting the battery). Will replacing the voltage regulator solve this problem? Are the responsible diodes with this regulator?

[@alancaballero4092]

Thanks for this video! It saved me a lot of money!

[@hyppere]

Hi Westronics. I have an Audi a6 1998 1,8 turbo, its been standing in a garage for 3 years. last week i charged the battery, but when you drive the car, after five minutes the car will stop. The battery on the dash is also flashing. the car worked perfectly when i parked it 3 years ago. What do i need? new battery? alternator? Regulator? appreciate any help. thank you.

[@pdee18]

Thanks for the video.... Is that a Irish/ polish accent?

[@coljev219]

great demo its just the solution for me thanks a million

[@gabrielfortune7239]

What could be the problem if my alternator has been checked & got a new battery & the light on dash board still comes on? Driving a polo 1.3 Tdi 2003

[@WestronicsIrl]

Well i think its a stuck brush problem (from being left up for a long time),brushes are situated in the regulator so replacing the regulator should solve it. But i cant guarantee this is the actual problem.

[@davidmckibbin7362]

Great Video !!

[@tylerjohnson6664]

I used a 140amp in a 00 audi tt which i think call for a 120 amp ..... what kinda problems will i have?????? stereo fuse cannot be changed without blowing..... no brake lights. just running lights. obd2 fuse when replaced makes the speakers whine without stereo on...

[@melbay6337]

Martin. You are a star.

[@kendyboston4225]

Does the regulator have a fuse . Where is it ? Thank you

[@Nicksory]

hi, what about changing the brushes on this one? doable?

[@aureliancheregi6609]

Nice job, I will fix like this my alternator problem !

[@mikewood3487]

Hi, many thanks for your really good video, good pointer for fixing my T4 which isn't charging. :)

[@siralexu]

Hi i have mk5 golf with a bosch alternator my battery warning light keeps in going on from time to time while driving for a few secconds and the lights go dim is this a situation when i can just change alternator and be done with it or is there something else?

[@iamthefatstig]

Hi, great video. Can this be done with the Valeo make as well?

[@msand951]

Link to buy the brush isnt working. What do i type on the search bar. I have that exact alternator.

[@TabaroShow]

When I press set memory seat button no light that comes up, but off and on switch lights up . Thx

[@SorinAncu]

Hello, do you have a tutorial how to change the diode rectifier on this alternator?

[@ivoka19811]

Hi! Isn`t possible to replace only the brushes on this type of regulators? Tnx!

[@Andrey-a-casa]

I do not think so. It is all sealed.

[@garyfirth]

cheers for that. looks same as my mini so i will give it a go

[@songezokombela8111]

Well done

Why it's still charging if I toke plug 1J0973772 off from alternator?

[@laurencereynolds9570]

Hi there, I've got a BMW 3 series, changed the battery to a new one as there was corrosion around terminals, cleaned the connections up but now getting the red battery indicator light on the dash. I can locate the alternator, you mention when you're putting the alternator back not to let a specific bolt touch metal as it could shorten the circuit - could you elaborate on that please? Great video too!

[@TabaroShow]

Hi, I have a q7 2011 and the driver seat stopped working and I don't know what the problem, do you know what I can diagnosis

[@kendyboston4225]

How can I test the old regulator to see if that's the problem ?

[@paulcochrane4363]

Great video thumbs up

[@bdavidlittle]

Thanks. Very well presented!

[@wbcars]

i wstawił Chinski regulator zamiast Originału F00m ... -:) but i enjoy the video .

[@WestronicsIrl]

Well...true,but if the red battery light comes up on the dashboard it has nothing to do with bad wires.Besides i never seen wiring of an alternator on new VW or AUDI,to give any trouble.

[@pererikbertholdsson8645]

stuck brush you say hm i will go and hawe a look (2003) skoda octavia new valeo regulator .. sems to fit but still red battery . hawent checked the voltage comming out of regulator yet otherwise great video . keep up the great work nd thanks.

[@davidsamways]

Nice one, thanks for sharing your expertise.

[@rickhctep1503]

Hi, Good video but I would have thought you would for safety reasons told people to disconnect the earth lead from the battery before doing the job.

[@toprod1000]

He took the alternator out !!! That requires you to dissconnect the battery cable !!

[@Wrofeel]

Hi, i have 1.9 TDI and after the firt start morning 10-15 the alternator is charging 10.8-11V, and after 30s is charging normali 14.2/14.3? where is the problem ?

[@gottom]

Thank you so much dude. Great video. Cool

[@raducanunicusor8801]

Hello , you put nuts wrong ! The thick nut must be where the battery wire comes from

[@EJR20]

How can I find this Regulator today?

[@stanomx]

This is just great! thank you sir