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Headlamp Washers - weird.
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mikeyp
 


Member Since: 29 Dec 2009
Location: London. Scotland. The Alps.
Posts: 131

United Kingdom 
Headlamp Washers - weird.

I cant work out how they work. Seem to have a mind of their own.

Full washer fluid. Lights on. Sometime the headlights wash when I wash the windscreen. Most of the time they don't.

Is there some kind of weird logic they apply to when the headlight washers work?

Thx
Mike.
  
Post #58055213th Jan 2010 3:21 pm
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Slimer
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Member Since: 06 Jan 2005
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Every 5th wash but only once within 10mins AFAIR
 The End  
Post #58055513th Jan 2010 3:23 pm
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simon
  


Member Since: 11 Jan 2005
Location: Shropshire
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United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

And more frequently when in Mud and Ruts... clever Thumbs Up
  
Post #58055613th Jan 2010 3:24 pm
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mikeyp
 


Member Since: 29 Dec 2009
Location: London. Scotland. The Alps.
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simon wrote:
And more frequently when in Mud and Ruts... clever Thumbs Up


Hmm. The plot thickens. My dealer didnt have a frickin clue about how they worked. What does it take for LR to produce a decent manual? FFS...
  
Post #58251215th Jan 2010 11:29 pm
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stapldm
 


Member Since: 11 Sep 2006
Location: Swine Town
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

mikeyp wrote:
...My dealer didnt have a frickin clue...

This is the bit that'd worry me a hell of a lot more...
 Dr. Ian Malcolm:
"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
Transgenic tomato anyone? 
 
Post #58257716th Jan 2010 8:51 am
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

Quote:
The headlamp washers are only active when the headlamps and ignition are switched on. If the washer reservoir fluid level becomes low, the instrument cluster sends a message, via the CAN bus, to the CJB, which suspends headlamp wash operation to preserve washer fluid in the reservoir.

With the ignition and lights on, headlamp wash is activated on the first operation of the wiper column control switch in the wash/wipe position. The CJB then suspends headlamp wash activation for the next 10 minutes and four operations of the wash/wipe switch.

The CJB monitors the operation of the wash/wipe switch and maintains a counter to restrict headlamp washer operation to every fourth operation of the wash/wipe switch in conjunction with a 10 minute timer. The timer prevents a second operation of the headlamp washers within a 10 minute period. Should the washer switch be activated for more than four programmed wipe requests during the 10 minute period, the headlamp washer will remain disabled. Only the next consecutive programmed wipe request, after the 10 timer has expired, will the headlamp washers be enabled. The counter and timer are reset when the ignition is switched off.

When headlamp wash is active, the CJB energises the washer pump twice per cycle. The headlamp washer pump is powered for a 0.5 second period.


any help ??
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
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D3 HSE MY06 - Re-Cycled Worldwide 
 
Post #58259016th Jan 2010 9:15 am
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mikeyp
 


Member Since: 29 Dec 2009
Location: London. Scotland. The Alps.
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Unnecessary quote removed

Brill. Now why couldn't they have explained that in the manual??

Out of interest, where did that information come from?

Thx !
  
Post #58260516th Jan 2010 9:42 am
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
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England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

it came from the workshop manual Thumbs Up
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide 
 
Post #58262216th Jan 2010 10:27 am
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blueanchorinn
D3 Decade 


Member Since: 07 Mar 2006
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United Kingdom 2006 Discovery 3 TDV6 HSE Auto Lugano TealDiscovery 3

I think if everything in the handbook was described in such detail the book wouldn't fit in the boot let alone the glovebox Laughing
 Pot Noodle Challenge Winner 2011
I refuse to have a battle of wits with an unarmed person 
 
Post #58264116th Jan 2010 11:02 am
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kenw
 


Member Since: 16 Jan 2010
Location: UK
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United Kingdom 2006 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3
Head lamp washer woorks but

Hi everybody

Head lamp washer woorks but the windscreen washer back and front has stopped working. motor is running so dont think its fuse. thought it might have frozen so put it in garage and it still isnt working. any body any ideas.Is there just one pump or two ?
  
Post #58268016th Jan 2010 12:08 pm
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DN
D3 Decade 


Member Since: 23 Jun 2006
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Ukraine 2006 Discovery 3 TDV6 Base 7 Seat Auto Zambezi SilverDiscovery 3

Welcome kenw, there are 2 pumps, the headlamp washers uses its own motor/pump,so I'd go for the fuse option first (for the front and rear screen washer motor/pump.)
  
Post #58268416th Jan 2010 12:17 pm
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kenw
 


Member Since: 16 Jan 2010
Location: UK
Posts: 4

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

wow that was quick.thanks.
in the manual it says fuse 11 for washers.am going to try that as you suggest .have alrady tied a piece of thread onto the extractor so will bre able to retrieve that when it drops.
  
Post #58269816th Jan 2010 12:55 pm
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lee01277
 


Member Since: 06 May 2005
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United Kingdom 2005 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3

don't forget to put something under the fuse for easy extraction next time. I use those plactic coverd thin wires that cables come tied up in so you can just yank them out later.
 ..............Somewhere in-between my old D3 and what's to come next .........  
Post #58270216th Jan 2010 1:02 pm
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TazDaz
 


Member Since: 07 May 2007
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ISTR many people have upgraded fuse 11 from 10 to 15Amp
no doubt a search will reveal this
  
Post #58270316th Jan 2010 1:04 pm
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simon
  


Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

Quote:
Hmm. The plot thickens. My dealer didnt have a frickin clue about how they worked. What does it take for LR to produce a decent manual? FFS...


mikeyp... From the manual Whistle

Quote:
HEADLAMP POWER WASH
If the headlamps are on, and there is sufficient liquid in the washer reservoir, operating the screen washer will also power-wash the headlamps.
The headlamp power wash will operate on every fifth operation of the screen washer, provided that the headlamps are still switched on and 10 minutes have elapsed since the last headlamp wash.
Switching the headlamps off and back on again will reset the cycle.
If the vehicle is fitted with the Terrain Response system, the headlamp wash will operate every third operation of the screen washer in all Special Programs (see Terrain Response, 210).
Note: In the screen washer reservoir, if the fluid level sensor detects a low level, the headlamp power wash is inhibited. Heated washer jets
If the ambient temperature falls to a point where icing of the washer jets could occur, power is applied to heat the jets provided that the starter switch is in position ’II’.
An approved screenwash is necessary to prevent freezing in very cold weather, see LUBRICANTS AND FLUIDS, 329.
 

Last edited by simon on 16th Jan 2010 5:34 pm. Edited 1 time in total 
Post #58270916th Jan 2010 1:17 pm
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