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headlight question

Started by Grant2012, February 28, 2014, 09:03:33 PM

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February 28, 2014, 09:03:33 PM
when you start the car should the headlights go out and come back on if already on?
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February 28, 2014, 09:10:45 PM #1
Yes.  The headlights go off while the engine is turning over (to give more power to start the engine)
March 09, 2014, 02:53:15 PM #2
SB, can you confirm that? I'm just looking at the wiring diagram for another project and the load reduction relay looks to only effect xenon lights?
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March 09, 2014, 03:21:02 PM #3
I can confirm that the halogen headlights go off while cranking engine, isn't that what they call the "X relief relay"
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March 09, 2014, 03:30:08 PM #4
Never head of that one?

The load reduction relay drops quite a few circuits on crank but appears not to touch the halogen lamps and only the xenon controllers not the supply to them either - looking at the whole diagram for headlights I can't see anything that would cause that behaviour so it must be the CJB controller itself doing that.
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
17 Volkswagen Touareg 3.0 V6 Diesel in Slate Blue
262Bhp AWD and Factory fresh...for now!
58 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)
LAUNCH X431 Pad PRO - Scanning & Coding for all makes and models done in Wiltshire in exchange for winegums! :)
March 09, 2014, 04:04:11 PM #5
X relief relay on elsawin = consumer cut off in the galaxy handbook
Relay position 26
Iv'e not checked this out myself just assumed that's what it's for.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
March 09, 2014, 10:21:43 PM #6
Rightly or wrongly I'd always just assumed that the headlights if switched on didn't go out whilst cranking but just dimmed due to the drop in battery voltage under load whilst cranking!
Always learning..... Often by mistakes!
March 10, 2014, 05:53:36 PM #7
Well see thats what I thought - Chris, without trying to be rude, have you actually been out and checked?
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
17 Volkswagen Touareg 3.0 V6 Diesel in Slate Blue
262Bhp AWD and Factory fresh...for now!
58 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)
LAUNCH X431 Pad PRO - Scanning & Coding for all makes and models done in Wiltshire in exchange for winegums! :)
March 10, 2014, 08:18:16 PM #8
Its not easy Mark to say without being rude but will try lol.
When cranking the engine whilst the headlights are switched on they extinguish while starter is operating this goes for the mk3 aswell I've seen it with my own eyes on my own two cars which both have halogen lights.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
March 10, 2014, 08:51:04 PM #9
Lol no thats perfect mate, cheers!
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
17 Volkswagen Touareg 3.0 V6 Diesel in Slate Blue
262Bhp AWD and Factory fresh...for now!
58 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)
LAUNCH X431 Pad PRO - Scanning & Coding for all makes and models done in Wiltshire in exchange for winegums! :)
March 10, 2014, 09:44:16 PM #10
Mine too.

(i) Ignition on (engine off).  Headlights are on.
(ii) While cranking headlights got out, think sidelights stay on (seen refelected in house windows).  Come on again when engine is running.

Same as when you take the keys out of the ignition and leave the headlights on, only sidelights stay on..

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