D3 Discovery 3 - Suspension Problem & Hawkeye Total

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Hello Gary,

FL26 is fine, FL5 my board is empty but on the lid it shows a pic of an engine with electric flash through that one. So I checked any that had a pic of the car moving up and found one of the slow blow fuses, 60 amp, in position fl10, is blown..

hi

where getting somewhere then , sounds like ur compressor has blown

but will of course be good to disconnect the compressors connectors and double check is has failed and not a wire shorted out
 
ps - noted and very much appreciated Gary - I wouldn't want to put you to any trouble (well, before I've bottomed out the obvious at least haha)

don’t be daft and ur very welcome , ur only up the road and always happy to help where i can

at least u know if u get stuck plse feel free to ask

also didn’t wish to come across in telling u how to suck eggs , ie what ur level of experience is
 
Hello Gary,

FL26 is fine, FL5 my board is empty but on the lid it shows a pic of an engine with electric flash through that one. So I checked any that had a pic of the car moving up and found one of the slow blow fuses, 60 amp, in position fl10, is blown..

apologises , why did i think it was F5 , doh , must be my age , again lol

is F3 and is a 5 amp ;)
 
Thats very generous and much appreciated. I've had a couple of Defenders and a couple of D2's so I've been around the block with a few issues and can wield a spanner on occasion - nothing too heavy duty mind. However, I usually research this stuff before wading in as you can't beat experience and you guys have proved it today - couple of messages later and I'm on the track of something at least.

I need to get hold of some of these big slow blow fuses, then I can start looking for power...Christmas Day tomoz so going to slow proceedings up a bit
 
Thats very generous and much appreciated. I've had a couple of Defenders and a couple of D2's so I've been around the block with a few issues and can wield a spanner on occasion - nothing too heavy duty mind. However, I usually research this stuff before wading in as you can't beat experience and you guys have proved it today - couple of messages later and I'm on the track of something at least.

I need to get hold of some of these big slow blow fuses, then I can start looking for power...Christmas Day tomoz so going to slow proceedings up a bit

ur very welcome and pleased it helped , there’s around 6 x of us now who own D3s and finding out all the gripes that land rovers have, lol

i’ve seen them fuses somewhere , will try and find the link for u , have already been down the route of a new compressor and reservoir air tank, lol

plse let us know how u get in and plenty of us to help with questions if ur unsure if something

PS , have the cam belts been replaced and the oil pump cover also been checked to ensure it’s the upgraded one

if u look on top of this section, u will see i’ve posted service guides and a buyers guide which says all about them
 
Thats great! I just tried Halfords in the vain hope they may still be open - but xmas eve at 6.45pm was rather optimistic eh. I can't swap any about as the others are all lower, 40amp etc, so I'll have to be patient I suppose and leave it until after Christmas. Either way i'll report back on findings or as more than likely - pose more questions.

Have a great Christmas all!
 

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Yup thanks - thats the one. I'll get a couple but clearly its gone because of a short or bad compressor. Looking at the site it appears wiring problems are abound so a short to something likely, if I disconnect the pump and try that first I suppose its the only thing likely to be in the system to create the draw on power requiring a 60a fuse - planned at least
 
Yup thanks - thats the one. I'll get a couple but clearly its gone because of a short or bad compressor. Looking at the site it appears wiring problems are abound so a short to something likely, if I disconnect the pump and try that first I suppose its the only thing likely to be in the system to create the draw on power requiring a 60a fuse - planned at least

great they are the right ones, agreed , ref the amount of amps req to blow that fuse , as for argument sake it was a shorted wire it would have blown the lower amperage fuses first

there are 2 x types of compressor , dunlop which replaced the oem hitachi or the AMK which is more expensive

island 4x4 down in kent i’ve found to be the cheapest , i fitted a dunlop compressor , think it was around £350

as a side note, when i done mine i also fitted a new compressor bracket , with the bushes and also the chassis clips to secure the bracket to the chassis , along with some new stainless steel bolts for the bottom plastic cover

put some dinotrol on the chassis whilst i had the compressor out and all new stainless steel bolts

one of the hardest things is getting the old plastic pipes out of the old compressor and the top fixing bolts

did buy some irwin sockets along with 6 x sided sockets
 
great they are the right ones, agreed , ref the amount of amps req to blow that fuse , as for argument sake it was a shorted wire it would have blown the lower amperage fuses first

I see, so would it be reasonable to assume pretty much everything should be ok with the rest of the system apart from compressor if its that 60a fuse then? If I disconnect plug, and don't get power to the plug and it's blown fuse again then wire grounding to compressor somewhere and possibly compressor ok? Can I safely test it by applying power direct to the compressor or will it jack up something in uncontrolled fashion
 

if u separate all of the compressor wiring connectors , move the compressor wires out of the way, install a new fuse, start the landy, then see if u have power on the wiring loom side connectors , if u do then it should indicate the loom side is ok

if u remove the compressor the suspension will indeed discharge and the landy will drop to its bump stops, u could try quickly putting 12 volts directly to the compressor but imagine it will pop the large fuse

a new relay should come with the new compressor , if u replace it with an AMK one u need a software update

however u won’t know the system is working 100% even after u fit a new compressor, as there could possibly be a bad wire further up the line , height sensors etc , in theory it should just be the compressor but u never know seeing u haven’t seen the system work yet, hope it hasn’t damaged the ecu , but the fuse should have protected that

will just be the case of starting with the compressor and working ur way through it bit by bit

there is a chart showing which wires or what on the compressor, will try and find it for u

if u do end up fitting a new one u will also need 2 x pushfit connectors for the plastic pipes on the end of the compressor
 
if u separate all of the compressor wiring connectors , move the compressor wires out of the way, install a new fuse, start the landy, then see if u have power on the wiring loom side connectors , if u do then it should indicate the loom side is ok

if u remove the compressor the suspension will indeed discharge and the landy will drop to its bump stops, u could try quickly putting 12 volts directly to the compressor but imagine it will pop the large fuse

a new relay should come with the new compressor , if u replace it with an AMK one u need a software update

however u won’t know the system is working 100% even after u fit a new compressor, as there could possibly be a bad wire further up the line , height sensors etc , in theory it should just be the compressor but u never know seeing u haven’t seen the system work yet, hope it hasn’t damaged the ecu , but the fuse should have protected that

will just be the case of starting with the compressor and working ur way through it bit by bit

there is a chart showing which wires or what on the compressor, will try and find it for u

if u do end up fitting a new one u will also need 2 x pushfit connectors for the plastic pipes on the end of the compressor


Thanks - That chart will be handy, I suppose the main feed will be fairly meaty with a 60a fuse.
 
here’s the wiring diagram , page 10 and yes u will see the large wires on the compressor

http://media.disco3.co.uk/gallery/albums/userpics/11480/LRL183853501(LR3-Wiring).pdf

Thanks. Thats busy isn't it haha - Still, I can gather the red and black look simple enough. Reading elsewhere it may be that fuse has blown not because of a short but perhaps because its been overworked, a leak possibly. If it was a leak, would the system not have collapsed somewhere or be on its bump stops?. Is there anything to be read into the fact that its not on bump stops?
 
Thanks. Thats busy isn't it haha - Still, I can gather the red and black look simple enough. Reading elsewhere it may be that fuse has blown not because of a short but perhaps because its been overworked, a leak possibly. If it was a leak, would the system not have collapsed somewhere or be on its bump stops?. Is there anything to be read into the fact that its not on bump stops?

the motor has indeed been pulling excessive amps causing the fuse to pop

as it’s staying at normal height is a good indication , but as we know won’t know there isn’t any other fault once it’s back up and running , ie once the reservoir valve opens there could be a pin hole in the air tank, main issue because you’ve just got it and won’t know everything else will work once the compressor has been replaced

think once you’ve tested ur compressor u will know more, of it’s condition, if it’s completely burnt out etc
 
the motor has indeed been pulling excessive amps causing the fuse to pop

as it’s staying at normal height is a good indication , but as we know won’t know there isn’t any other fault once it’s back up and running , ie once the reservoir valve opens there could be a pin hole in the air tank, main issue because you’ve just got it and won’t know everything else will work once the compressor has been replaced

think once you’ve tested ur compressor u will know more, of it’s condition, if it’s completely burnt out etc

Update:

Managed to get a J type fuse just now (Big up Halfords open Boxing Day :)) and fitted fuse - and everything started happening. I asked it to raise and screen said something about raising - I could hear the compressor when outside the car, quite faint mind - I expected it to be a reasonable loud brrrrrrddd. That said, maybe thats because when I looked at the dash it said vehicle raising slowly (or similar). It looks like its raised fair bit from its height before i started, I stupidly didnt measure where it started from before my experiment. I couldn't hear any hissing air leaks and assume compressor can make a fair amount so a leak would be evident if it were stopping it going up by a significant amount. I turned engine off after perhaps 2 minutes so I didn't blow fuse again pending some replies here if poss. All suspension warnings and orange light went off. I had selected off road height it said on screen.
So, does it sound like weak compressor? Are they reconditionable - I've seen kits but most searches only talk of replacement so are they a lost cause or special tools req?
 
Heights after 15 mins switched off are, with 255/60/18 tyres, and ground to underside of wheel arch centre;
Front N/s 805mm Front O/s 810mm Rear N/s 835mm and rear o/s 850mm (note it is on slight downwards sloping drive and I have not checked tyre pressures)

Should it hold this for how long I wonder?
 
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