C3 Picasso 2009 Braking System Faulty
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Airdman65
- Posts: 12
- Joined: 14 Apr 2026, 10:11
Re: C3 Picasso 2009 Braking System Faulty
Indeed. Lucky me!!
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mickthemaverick
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Re: C3 Picasso 2009 Braking System Faulty
Did you remove all the fuses including the maxi fuses during the testing? 
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
I used to ride on two wheels, but now I need all four!
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Airdman65
- Posts: 12
- Joined: 14 Apr 2026, 10:11
Re: C3 Picasso 2009 Braking System Faulty
One at a time, yes. I checked all the maxi fuses too. Removed the BSM completely and then had just the maxi fuse holder connected to 12V as before. No change again, still a 2 amp drain. I may disconnect the ECU next and check, that will rule out the feed to it at least.
I have ruled out the BSM as this is a replacement part, it has to be a chafed cable or a stuck relay I suspect, more likely the latter. I still can't find any relay or wiring diagrams which would help.
I have ruled out the BSM as this is a replacement part, it has to be a chafed cable or a stuck relay I suspect, more likely the latter. I still can't find any relay or wiring diagrams which would help.
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Airdman65
- Posts: 12
- Joined: 14 Apr 2026, 10:11
Re: C3 Picasso 2009 Braking System Faulty
Ah! How about the diode pack on the alternator? Could be something to rule out, if I can disconnect the alternator and test again. I need small hands!
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mickthemaverick
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Re: C3 Picasso 2009 Braking System Faulty
You may find some relevant diagrams here: https://www.176iot.com/how-to-connect-s ... nd-switch/
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
I used to ride on two wheels, but now I need all four!