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No power to compressor
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3
No power to compressor

Suspension fail yesterday and after checking all the fuses and a full reset still had the same issue.

I thought the compressor was running but it was windy yesterday and it turns out its not running.

I have checked all the fuses again in both fuse boards relating to the compressor and they are all good but the is still no power at the compressor.

I have tested the compressor as I had removed it and if runs fine with a 12v supply so think I'm OK regarding the compressor.

Checked the voltage on both plugs an the main feed is dead the other plug has something like 5v and 12 v on it.

Could someone list ALL the fuses related to the compressor, I'm starting to think it might be a wiring issue but on the off chance I have missed a fuse it might be a handy fix.


Open to all suggestions.

Starting to panic as I need the car tonight.


Only error codes O have are U0416 and U0421 read with the nanocom Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176863025th Jan 2017 1:11 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10360

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

The main components to power the compressor are:

The 70A relay. (could be grey)
One of the large fuses.

I guess you could try removing the big relay, and stuff a bit of wire between the 2 large contacts briefly.

If you get sparking and compressor running, that leaves the relay or the ecu system at fault.

but does prove the fuse and wiring to compressor are ok  
Post #176864825th Jan 2017 1:45 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

Yes I have removed the cover of the relay and operated it by hand and then the compressor runs. Going to check now is I put power across pins 85 and 86 of the relay will it operate.



I'll update once I have tested that the relay is OK. Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176865825th Jan 2017 1:55 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3
Update

Removed the relay and bench tested it and it's working fine, when powered relay operates and closes the connection as it should.



So where to start looking now? Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176866725th Jan 2017 2:06 pm
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trainmanone
 


Member Since: 19 Dec 2014
Location: stockport
Posts: 366

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

bridge connectors for relay in fuse box see if comp runs then  
Post #176876225th Jan 2017 5:25 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10360

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

oh dear. That's all the easy things.


I guess you need to read the fault codes and see what they say.


You could try removing the small 20A suspension fuse, just incase a ecu reset helps

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Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green   
Post #176880125th Jan 2017 6:23 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

Peter


Here of the fault codes I'm getting.






 Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176882125th Jan 2017 6:51 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

trainmanone wrote:
bridge connectors for relay in fuse box see if comp runs then



Yes did this and compressor runs. Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176882625th Jan 2017 6:52 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10360

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

that last one says the ecu is faulty ? Crying or Very sad


It's by the pedals I think  
Post #176883925th Jan 2017 7:00 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

ECU or ride level module, I thought that was behind the battery. Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176889725th Jan 2017 7:56 pm
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trainmanone
 


Member Since: 19 Dec 2014
Location: stockport
Posts: 366

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

if comp runs with bridging the contacts try a new relay then all should be ok  
Post #176892725th Jan 2017 8:39 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

I have tested the relay on the bench and its working 100 % Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176893425th Jan 2017 8:49 pm
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trainmanone
 


Member Since: 19 Dec 2014
Location: stockport
Posts: 366

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

but you say that bridging connectors and the comp runs, if that's the case the relay is at fault .

try bridging the connectors again( the big ones ) don't rely on just hearing the contacts going over when bench testing relay  
Post #176893825th Jan 2017 8:56 pm
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therealboss
 


Member Since: 21 Mar 2014
Location: Co Carlow
Posts: 1958

Ireland 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

I tested the relay in the workshop and is is working, I pulled the cover off it and could see it operate. I then placed it back in the car with its cover off and it's not switching so its what ever tell it to operate where the issue must be.

The relay is not getting the signal to operate so replacing it will not make any diffrence from the way I see it. Dale




Mods to date.
D4 Rear Lights
Xenon Lights fitted & De-Tangoed
RAI, V8 Brake Upgrade, AMK Compressor
Beanie Grill
ProSpeed Roof Rack & Ladder
ProSpeed Tree/Rock Sliders
Disco3.co.uk Orange Sticker
ATR's Fitted
Club Blackvue  
Post #176894825th Jan 2017 9:12 pm
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trainmanone
 


Member Since: 19 Dec 2014
Location: stockport
Posts: 366

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

ok sorry that's the limit of my knowledge,hope you get sorted .  
Post #176895525th Jan 2017 9:19 pm
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