Thanks - that makes sense. I'll try that tomorrow when storm Arwen eases
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Moderator: RichardW
It is VERY rare that a maxi fuse would blow. You would probably see smoke first! I was thinking more along the lines of corrosion on the spade connections. So I would remove them and look for something amiss.napping wrote: ↑27 Nov 2021, 19:04
Earlier I removed the BSM to inspect the maxi fuses and tested each fuse to see if any were blown - none were. So far I haven't pulled any of the maxi fuses out as they felt well seated and they didn't want to budge. Perhaps the next step is to test for an open circuit to the BSI - but without a wiring diagram for the Mk2 I fear prodding with a multimeter could do more harm than good!
I bought a Haynes manual specifically for a wiring diagram, but the manual only shows the Mk1 BSM/BSI - and despite trawling the net I have not managed to track one down yet.![]()
The Mk1 BSM has a 2 pin black connector with a single mauve wire going back to the starter solenoid. This allows you to do what Wheeler has suggested, power the solenoid and engage the starter. Why did they get rid of it for the MK2? Don't know! It's very handy if the sensodrive "locks out" in ECO mode.wheeler wrote: ↑27 Nov 2021, 11:07 Can you try disconnecting the plug on the yellow connector shown below (the plug iteslf will probably be grey).
Give Pin 2 a 12v feed & see if the starter operates. I think the pins are numbered right to left as you look at it but please check.
PLEASE ENSURE THE GEARBOX IS IN NEUTRAL BEFORE DOING THIS
Been There
Exactly, this is all im wanting to see at the moment & should confirm nothing has been missed when checking the main earths,power supplies & battery connections. This is very easy to to like not using a good clean connection when using a jump lead as a temporary earth.ozvtr wrote: ↑28 Nov 2021, 01:21I think the engine will turn over but I'm not sure it will get you any further ahead. It will test if there is a good connection at the battery, the engine earth and the starter. And it will check the status of the battery (if it turns over the battery is OK). But you said you checked all those things? It wont solve the problem of lack of power to the rest of the car.
I did at the beginning of this post specifically ask the OP if there was power getting to both sides of the maxi fuses & they said yes??ozvtr wrote: ↑28 Nov 2021, 01:21Power is getting to the BSM fuses but ON THE SURFACE it appears it is not getting from the battery to the maxi fuses. At this point I'm lost! How can it NOT get from the stud to the maxi fuse block? OR if something in the car is powering up, How is the power getting to some circuits and not others!!??
wheeler wrote: ↑28 Nov 2021, 08:02So, I tried pin 2 on the yellow connector and the engine cranked over like it has a new battery (not surprising considering I replaced the battery back in March).
Next I'll check the leads coming from the maxi fuses, but I guess I'll need to nick the plastic wire coating first in order to test the current on the wires that come from the maxi fuses box.
Just double-checked and all the line outputs from the maxi fuse box show 12v+. The engine turns over when 12v is passed through pin 2 on the grey connector. There is a single beep when the battery is reconnected but still nothing else works.wheeler wrote: ↑28 Nov 2021, 08:02I did at the beginning of this post specifically ask the OP if there was power getting to both sides of the maxi fuses & they said yes??ozvtr wrote: ↑28 Nov 2021, 01:21Power is getting to the BSM fuses but ON THE SURFACE it appears it is not getting from the battery to the maxi fuses. At this point I'm lost! How can it NOT get from the stud to the maxi fuse block? OR if something in the car is powering up, How is the power getting to some circuits and not others!!??
It was your experience with that that prompted my post James.Hell Razor5543 wrote: ↑29 Nov 2021, 15:08 Good thought on the fuses (corrosion on the blades). I had the rear wiper on an earlier C5 stop working, and when I unplugged/plugged the fuse in several times the wiper started working again (I had checked the fuse and it looked intact).
Thanks all for your help with this puzzle!
That's a thought. Although it's unlikely to be an issue with all the fuses, I might as well try it!
The beep comes from the steering column area when I reconnect the battery.Dormouse wrote: ↑30 Nov 2021, 09:11 From the Subs Bench again. Is the Immobiliser situated near the steering column and could it beep? Can't see how it would affect all the circuits though but something is beeping so power must be getting that far. Given the number of separate circuits, the fault has to be centralised in the wiring circuit, surely? The chances of several faults occurring simultaneously are so remote. That would point me to a central return earth strap not the feed wires.
Do the side lights work, for instance, or the radio, dashboard, horn or power sockets? What is there that does work?
Does the car have towing electrics, especially S circuit connections, or any aftermarket radios or other associated hifi items?