Citroen C4 Picasso battery light on, alternator not charging. Fault finding and repair. 

What happens in case of 2-wire connection to alternator in C4 Picasso?

​@@arekxthe second wire on peugeot/CITROËN with modern BCM is not used. You can even disconnect it and nothing will happen. This wire was used on old dashboards with the battery light, to let you know that there is a fault in the charging system.

@@arm2644 Interesting. Because I was reading that newer units use LIN digital protocol and not PWM.

There is different systems out there... Thank you for watching and for your comment! 👍👍👍

Absolutely... Thank you for watching and for your comment!

@@LMAutoRepairs i have a small problem with my c4 Picasso. Sometimes the battery light comes on. But my main problem is with the ESP and parking brake. It says that they're faulty. And the f19 fuse in the engine compartment fuse box always blows. I've ordered a new alternator and I'm waiting for it, and i might have to change the battery as well, because its a 45 amp, but I'm not sure it will solve my problems. Do you have any electrical diagram of that fuse box? I need to know what goes through that fuse exactly. I hope it's just a sensor or something that can be easily replaceable and not a wire.

I can have a quick look if you give more details about the car... Year, engine, which fuse box is the fuse blowing... 👍👍👍

@@LMAutoRepairs it's a Citroen C4 Picasso 1.6vti. I'm talking about the fusebox next to the battery. As you look at the fusebox while it's on the car, it's the 3rd fuse counting from top left. First one is a bigger type 30 amp fuse, then a small type 10 amp, and the next one is the problematic blue 15 amp fuse. In the manual it says that the fuse is for the engine components. But I've tested it with lexia and the engine is almost the only one with no fault codes. And for the ESP it says that there's no communication with the engine ECU. I will do what you have done and test the alternator, because I've owned other psa cars in the past, an i know that when the alternator doesn't supply enough, all the systems go crazy. But i cant explain the fuse goin out every time i put a new one and turn the ignition on.

You haven't said what year is the car...

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That's great! 😊 Thank you for watching and for your comment!

That's great! I will when I get one... Thanks! 👍👍👍

I am from French connection spares Rossendale we brake Citroen and Peugeot car's if you need anything ring and ask for Col

@@colinhamer6506 That's good... I am always working on French stuff...

@@LMAutoRepairs please give me a call I have so many things you could do for us 🤞

Thanks! 👍👍👍

Thanks!

Hi Not that expensive if you go reconditioned... Thank you for watching!

Thanks! 👍👍👍

Thanks!

I do what I can with the tools I have... I don't do these every days.... lol But I agree with you, obviously.... Thank you for watching and for your comment!

😋 Thanks... for watching and for your comment!

Thank you for watching and for your comment!

Difficult to help with only that description of the problem... What are the codes stored? What are the symptoms of the car? What parts have been replaced? What else has been checked, like wiring etc...? 👍👍

Thanks!

Never had that issue... Check for codes, and analyse live data... Thank you for watching!

I have same issue now. I wonder If you have a solution can you share with me? kind regards.

@@mrylcn3.0 I ended up selling the car man it was impossible to fix I left it with 3 mechanics and nobody could manage to fix it . It was such a dangerous problem because the steering wasn’t just heavy before it kicked in it was near impossible to steer shame because I really liked the car lol

First I don't have "a place"... That aside, you clearly skipped the video... I mentioned the 4 bolts, including the 2 bottom ones... and no, you don't need to lift the car... Thank you for watching! 👍👍👍

@@LMAutoRepairs yes you did mention great 👍

Lol 👍

I feel your pain. My thoughts exactly

Is that an electric thermostat? Could the the thermostat stuck closed... 👍👍👍

Hej sorry again i changed the thermostat new 3 day before

Well, in that case check wiring etc... 👍👍

More coming... don't worry...😉 Thank you for watching and for your comment!

Thanks! 👍👍👍

Could be... the alternator feedback line... Thank you for watching!

It might be on its way out... Is not really normal so much fluctuation... Thank you for watching and for your comment!

@@LMAutoRepairs really like your videos and how you explained things , thanks for sharing the info.. yes that's what im thinking, but as you said this has a battery monoriting module , so i tought under low load no increase in voltage, gonna test under load now but idk .. thanks

@@cristianojoana1898 Obviously you know better under which circumstances the voltage changes... And you can better judge is is normal or not...

@@LMAutoRepairs tested it 10min not even underload it goes above.. at idle only 12.80v or 13.10v sometimes i rev it up increases ..others decrease .. never experienced nothing like this... its really faulty alternator.. thanks

I just now see on the alternator " 12v 180a ' as i looked for alternator to buy i see only 12v advertasided is possible to work in the 12v to 14 range ??

Ah Thanks Leon!

Hi The Autel? Thank you for watching and for your comment!

👍 Thank you for watching and for your comment! 👍👍👍