Picasso BSM help with replacement parts

Hi I have a 2010 C3 Picasso (Diesel). I took it into a garage after finding one dipped beam was dead despite the fuses and bulb being good. I was told that the mechanic found burned wires under one of the large rectangular fuses?

The mechanic recommend replacing the whole fuse box plus the damaged large rectangular fuse. What I am wondering is what are the part numbers for these large fuses? I have found a new BSM with the correct part number but the large plugs are empty and I do not know the part numbers for replacements.

Dangernoodle wrote: ↑Thu Feb 02, 2023 7:09 pm Hi I have a 2010 C3 Picasso (Diesel). I took it into a garage after finding one dipped beam was dead despite the fuses and bulb being good. I was told that the mechanic found burned wires under one of the large rectangular fuses?

The mechanic recommend replacing the whole fuse box plus the damaged large rectangular fuse. What I am wondering is what are the part numbers for these large fuses? I have found a new BSM with the correct part number but the large plugs are empty and I do not know the part numbers for replacements.

Hi

I am thinking you are describing the maxi fuses?

They don't have part numbers. They are just fuses.

A picture attached, following these instructions can help us identify what you are looking at.

From what I have found through searching I think they are the maxi fuses. Looking at the information printed into the replacement board the sockets are coloured and labelled as "PF MARRON" "PF GRIS" and "PF NOIR"

Looking at the information printed into the replacement board the sockets are coloured and labelled as "PF MARRON" "PF GRIS" and "PF NOIR"

The PF (colour) are sockets that the loom on the car connects to.


If you have damaged plugs on the car, you will be better to find a BSM that has the plugs (and a short bit of cable) to make a repair or better still, a whole new loom.



These are the fuses:

Thanks for the reply. Do you know if there is a specific loom I'd need or would it just be whole engine loom?
Also, if you have any idea, what would cause these plugs to go bad in the first place?

Dangernoodle wrote: ↑Thu Feb 02, 2023 8:32 pm Also, if you have any idea, what would cause these plugs to go bad in the first place?

The plugs don't normally go bad. If they are corroded then that would be water ingress.

If they are burnt, then that would be some serious over current that is very rare. That never happens, unless there is a very serious fault with a particular electrical component.

If you can identify which plug, then which pin of that plug that is burnt, it can be possible to trace it back to the part it serves. Then check that part thoroughly. If you don't find the cause before changing the BSM, you can easily damage another BSM...

Do you know if there is a specific loom I'd need or would it just be whole engine loom?

Which plug is faulty/has the damaged pin?

PF MARRON, PF GRIS or PF NOIR?

Off the top of my head I can't remember, although I was told by the mechanic at the time! The issue that brought this up however was a dipped beam on the right hand side that was not functioning while the lights on the left were fine.

Prior to discovery of the damaged PF i checked the small fuses and found they were fine. I then checked the bulbs and both were fine.

The maxi fuses are a square "box" shaped fuse under the BSM. They are not like the maxi fuses shown in c3driver52's picture. While the "maxifuses" shown in C3driver52's picture may substitute for the ones shown in my picture it's unlikely you will fine one in there.
However that is irrelevant as the maxi fuses can not be blown. At least not for the headlights as none of the maxifuses go to the headlights! The smaller fuses in the BSM are the only fuses from the battery to the bulb filaments.
You will need to use a multimeter to check for voltage from the BSM fuse to the connector in the head lamp assembly.
The fault can only be from the relay in the BSM to the fuse to the electrical connector (of the BSM) to the headlamp connector to the interior of the lamp assembly. It cant be an earth as that is common to the turn indicator and side lights. And it cant be the relay as that is common to the left lamp.
Are you sure the lamp is correctly seated in the lamp assembly? And that there is no corrosion of the lamp contacts?
The wiring does go from the connector on the top of the BSM around and under the BSM and out through the bottom of the fuse box. You might be able to see that in the Photo. It's possible the damaged wire that the mechanic is talking about does go to the head light.
It would be more economical to repair the wire than replace the wiring loom. The engine bay wiring loom is all one piece and emanates from the interior of the car and goes all around the periphery of the engine bay!