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Questions not related to the fuel type, like Manual Gearbox, Body Work, Lights, Interior trim and Seats, Steering, Brakes, Beeping, Wheels and Tyres to be asked in this topic only.
Audio has its own section - see further down the page.
Please provide as much information as you think may be relevant like recent work on the car and you can attach photographs directly to your topic using the form below the text box.
Forum rules One question per topic. No Engine questions
Think: Manual Gearbox, Seats, Bodywork, Lighting, Interior, A/C, Heater, Wheels, Steering, Brakes, Tyres and Suspension
ssybrg10 wrote: ↑Thu Nov 24, 2022 3:05 pm
I just poured a kettle of water over the windscreen and it all poured into the area where the suspension top mount bolt is. Is that supposed happen or should the windscreen stop the water from going into the engine side. Thank you
No that shouldn't happen.
The plastic area at the bottom of the windscreen is called the scuttle panel (the windscreen wiper arms poke through it). There are 2 drain holes under it and adjacent to the shock mount retainers (the suspension top bolt as you called it). The drain holes can get blocked with leaves and dross. This can cause an over flow and water to drain into the engine compartment.
To remove the scuttle panel you will need to remove the windscreen wiper arms and some screws and clips. Getting the wiper arms off the shafts is the hardest part. After years the arms can stick to the shafts. Make sure the little holes in the scuttle panel are also open.
ssybrg10 wrote: ↑Fri Nov 25, 2022 10:48 am
Hello again lol I just spotted the fuse box in engine compartment has melted plastic. Do you think water dam could do that. I have attached a photo
Hi
Well, the BSM is toast now, so take it out, open it up and look to see if its full of water or shows any water damage. Typically a powdery crust is left by water damage.
You have nothing to loose by breaking it open to inspect inside.
ssybrg10 wrote: ↑Fri Nov 25, 2022 11:08 am
That’s great, just having issues getting plugs out lol
If the plugs are damaged also, you are in for a bumpy ride.
You can get BSM modules, complete with the plugs and a short length of cable, but that will mean, manually and properly (solder and heatshrink) each of the wires of the melted/damaged plugs.
Time consuming and takes a degree of soldering skills. There just isn't enough space to crimp and reliability is not so good with crimps, no matter how well you do them.
I was just wondering would it matter if I bought one that is for petrol car. I have a diesel car but I only see petrol ones for sale. The one I saw was exact same serial number under the barcode so I was wondering if that one was ok to use
Looking back at the photos you kindly provided it looks very messy.
I would do as much checking as you can that everything else it ok before you fit the replacement BSM.
You don't want to smoke another BSM module as this gets expensive.
Finding and fixing the cause it a top prority.
I mentioned about inspecting the old BSM for water damage, but what else could cause that sort of catastrophic failure? I looks like a dead short across the battery, unfused. All very unusual and not a common problem for the C3.
A good start would be to look for modifications that are not part of the original C3 design. Something that a previous owner has added may have gone bad.
ssybrg10 wrote: ↑Fri Nov 25, 2022 12:41 pm
The only thing I changed was a back light cluster unit, would that possibly cause it?
If that was the last thing that was changed before it melted the BSM, then yes, I would start by checking the rear cluster wiring for faults before replacing the BSM module.
