Disco 2 TD5 HRW blowing fuses

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Download electrical library from the dropbox link at page 17 above and see "Connector views", you cand turn 90 degrees the fusebox if you undo the bolt and reach the plug, a bit fiddly but not a killer
 
sierrafery said:
Download electrical library from the dropbox link at page 17 above and see "Connector views", you can turn 90 degrees the fusebox if you undo the bolt and reach the plug, a bit fiddly but not a killer
Click to expand...
Got it & all technicolour pictures as well :).Should I disconnect the battery before I start ? Thanks again.
 
Yes. it's a good move to disconnect the battery's negative lead each time you unplug any connector on that fusebox or ECUs cos it's a complex thing which has digital communication with the BCU not just a simple fuse pack
 
For easier access to C0582 I've had to remove C0583 (slightly bigger in size). According to the manual pin 4 in C0582 should have a brown with purple trace wire but mine has purple with a green trace where as C0583 has a brown with purple trace in pin 4 so I'm a bit scared to remove either, @sierrafery can you confirm which one I do before I go any further? Many thanks. (C0583 is on the left in the first pic with the brown/purple in pin 4 & plugs in above C0582)
20211105_121149.jpg
20211105_121200.jpg
20211105_121227.jpg
 
Andy Warren said:
I pulled pin 4 out of C0582 Green with purple trace but it still blew the fuse:( so it looks like it's a new fuse box:(:(:(.
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I know you have requested sierrafery to confirm and he has vastly more experience so I don't want to interfere and confuse matters, but I believe there could be an error in the electrical library, I think the photos showing CO582 and CO583 have the arrows pointing at the wrong connectors, CO582 and CO583 are possibly reversed!

To avoid you replacing the IDM, I would compare all the colours all of the cables of CO582 and CO583 with those shown in the tables for the connectors (pages 573 and 574 in my version of the electrical library) to confirm my suspicion. Maybe @sierrafery could jump in here too.

Good luck, I hope you don't have to replace the IDM.
 
Looking at the back of the fuse box the connector no's are embossed in the plastic & are as the manual lists them it was just the NP (brown/purple) is in C0583 & not C0582 if that's the colour I have to remove.
 
Andy Warren said:
Looking at the back of the fuse box the connector no's are embossed in the plastic & are as the manual lists them it was just the NP (brown/purple) is in C0583 & not C0582 if that's the colour I have to remove.
Click to expand...
Well that's really interesting!!!! A photo of the connector side of my IDM when I removed it to repair water damage is the one I didn't take!:mad: I'm worried about giving you cr@p info...

However, in your second photo, the connector you are holding has a brown/purple wire and diagonally opposite a large brown/white (pin 3), pin 5 is pink/red all match that connector being CO582 as on the circuit diagram and in the connector details in the electrical library. So have LR printed the wrong connector number on the IDM and in the electrical library? You could try removing the brown/purple from pin 4 as if it is really CO583, it is only the power to the radio amplifier.

I'm really confused by this, can LR be wrong? I would like Fery to add his thoughts on this. I have to go out soon to a firework display with the grandchildren but will give it more thought.

Cheers.
 
sierrafery said:
Won't be the first time when the diagram is not 100% accurate but the wire colour should be most relevant
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Hi, according to pg 103 of the electrical circuit diagrams C0583-4 is for the audio system & should have a PG (purple/green) wire but mine has a brown/purple (PN)
Then according to pg 73 of the ECD's C0582-4 is for the HRW, as you correctly stated, & should be brown/purple (PN) but on mine it's purple/green (PG)
So it seems there's an error somewhere.
Can you just confirm I did the right thing by removing pin 4 from C0582 despite my wire being PG instead of PN & as it still blew F8 I need a replace the passenger fuse box? Many thanks again to you & PopPops for your help.
 
Andy Warren said:
Hi, according to pg 103 of the electrical circuit diagrams C0583-4 is for the audio system & should have a PG (purple/green) wire but mine has a brown/purple (PN)
Then according to pg 73 of the ECD's C0582-4 is for the HRW, as you correctly stated, & should be brown/purple (PN) but on mine it's purple/green (PG)
So it seems there's an error somewhere.
Can you just confirm I did the right thing by removing pin 4 from C0582 despite my wire being PG instead of PN & as it still blew F8 I need a replace the passenger fuse box? Many thanks again to you & PopPops for your help.
Click to expand...
From Ferry's comment above that it wouldn't be the first time there is an error on the diagram, and go by the colour, I would say remove the purple/brown one, not the purple green, it is possible 582 and 583 are mis-labeled. To me, the connector you have in your hand in the second photo is the one in the ECD as 582, so un-pin the purple/brown, replace the purple/green and see if the fuse blows.

This is getting complicated isn't it!

Good luck.
 
PopPops said:
From Ferry's comment above that it wouldn't be the first time there is an error on the diagram, and go by the colour, I would say remove the purple/brown one, not the purple green, it is possible 582 and 583 are mis-labeled. To me, the connector you have in your hand in the second photo is the one in the ECD as 582, so un-pin the purple/brown, replace the purple/green and see if the fuse blows.

This is getting complicated isn't it!

Good luck.
Click to expand...
Your not wrong on the complicated/confusion front. As the HRW circuit draws more current than the audio side of things, it would make sense removing pin 4 (with brown/purple wire) from C0583 as it's a bigger connector with thicker wires, well that's my fuzzy logic anywayo_O. I'll give it a bash Sunday.
At £261 for a new FB:eek:. Painful though it is, it is very easy to replace & will be a lot less hassle than tracking down a short somewhere, roll on Sunday:).
 
Andy Warren said:
Your not wrong on the complicated/confusion front. As the HRW circuit draws more current than the audio side of things, it would make sense removing pin 4 (with brown/purple wire) from C0583 as it's a bigger connector with thicker wires, well that's my fuzzy logic anywayo_O. I'll give it a bash Sunday.
At £261 for a new FB:eek:. Painful though it is, it is very easy to replace & will be a lot less hassle than tracking down a short somewhere, roll on Sunday:).
Click to expand...
Yes, the thicker wire, brown/purple, would be more likely to be the heavier current HRW one.

Good luck Sunday!
 
I wish I knew what was going on here. No matter what I do, I seem to be electric dyslexic.
When you guys say, remove pin, do you mean physically remove the pin. I also wonder why if it’s water ingress causing the issue, does drying it out not solve the issue ?? Or does water cause issues in ECU’s etc even if they don’t actually get wet :confused:
I’m not that thick that I don’t know water can kill a modern car by the way ;)
 
If you look at the pic I've removed 'pin' 4 with the brown/ purple wire from C0582 which is the brown connector in the background. If I now plug all the connectors back into the fuse box with 'pin' 4 hanging loose man & switch the HRW on & it still blows fuse 8 then I'll know it's the fuse box at fault somewhere, however if it doesn't blow it, it will be a direct short on that brown/purple wire somewhere as I've already isolated the mirrors & HRW element. I've put the MM on continuity (beep) & checked between that brown/purple wire & earth & the meter beeps so it looks like a short on it somewhere but I'll continue with checking the fuse box whilst I'm here, hope that's as clear as mud o_O
20211107_120432.jpg
 
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