Lights on =engine Off

Number 6 · 9th November 2016, 20:07

Well then got into the car tonight started up as normal,Turned the Headlights on and the engine stopped.

Tried to start it and it would not start,Switched the lights off,left it about 30 seconds started up straight away again.Put the lights on and all OK

Any one any ideas?
It does have HID units fitted but these have been on for a number of years and never had this problem before.

So anyone ?

klarzy · 9th November 2016, 20:10

Quote:

Originally Posted by Number 6

Well then got into the car tonight started up as normal,Turned the Headlights on and the engine stopped.

Tried to start it and it would not start,Switched the lights off,left it about 30 seconds started up straight away again.Put the lights on and all OK

Any one any ideas?
It does have HID units fitted but these have been on for a number of years and never had this problem before.

So anyone ?

Sounds a bit like an intermittent short... perhaps water in a connector...?

Number 6 · 9th November 2016, 20:17

Quote:

Originally Posted by klarzy

Sounds a bit like an intermittent short... perhaps water in a connector...?

Well could be,But Which one to go for thats the problem

COLVERT · 9th November 2016, 20:31

Unusual fault with a diesel. ( It is a TD as your profile says CD ?? )

Try your battery connections to make sure they are clean and you have a good contact. Also the battery earth to the engine.

About the only thing that would stop a diesel engine is a sudden loss of current to the ECU.

Putting on the lights with a poor connection somewhere could do this.

Jakg · 9th November 2016, 21:08

HIDs can do this, something to do with AC vs DC ballasts.

I had some fitted in the main beam and my engine cut out when I put them on sometimes...

COLVERT · 9th November 2016, 21:16

Quote:

Originally Posted by Jakg

HIDs can do this, something to do with AC vs DC ballasts.

I had some fitted in the main beam and my engine cut out when I put them on sometimes...

Probably sending some nasty little spikes around the cars wiring and upsetting the ECU.---

Avulon · 9th November 2016, 21:25

miIne did this using aftermarket HIDs about a month ago, I was a little worried that I was going to be stranded so just raised the revs above tickover next time I turned them on and everything was ok. It's never done it since. I do know that the initial startup on the HIDs can pull more current than conventional bulbs do but once lit they use a lot less. So I put the cutout down to the startup pulling the voltage to low for the ecu to charge the capacitors for the injector firing.

klarzy · 9th November 2016, 21:27

Quote:

Originally Posted by Avulon

miIne did this using aftermarket HIDs about a month ago, I was a little worried that I was going to be stranded so just raised the revs above tickover next time I turned them on and everything was ok. It's never done it since. I do know that the initial startup on the HIDs can pull more current than conventional bulbs do but once lit they use a lot less. So I put the cutout down to the startup pulling the voltage to low for the ecu to charge the capacitors for the injector firing.

i would question your alternator output or wiring then....

Number 6 · 9th November 2016, 21:36

Quote:

Originally Posted by klarzy

i would question your alternator output or wiring then....

OK guys thanks for the replies,,Will have a good look round tomorrow see what I can find.

COLVERT · 9th November 2016, 21:43

Quote:

Originally Posted by klarzy

i would question your alternator output or wiring then....

However it does seem to be more than one person with this effect.

Unless they have in common, alternator or wiring problems.

Like Trump for president----we'll just have to wait and see.---

9th November 2016, 20:07	#1
Number 6 This is my second home Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008 Location: Meneac Posts: 6,759 Thanks: 5,007 Thanked 1,609 Times in 869 Posts	Lights on =engine Off Well then got into the car tonight started up as normal,Turned the Headlights on and the engine stopped. Tried to start it and it would not start,Switched the lights off,left it about 30 seconds started up straight away again.Put the lights on and all OK Any one any ideas? It does have HID units fitted but these have been on for a number of years and never had this problem before. So anyone ? __________________ ] "I started out with nothing, and Ive still got most of it left!"

9th November 2016, 21:25	#7
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	miIne did this using aftermarket HIDs about a month ago, I was a little worried that I was going to be stranded so just raised the revs above tickover next time I turned them on and everything was ok. It's never done it since. I do know that the initial startup on the HIDs can pull more current than conventional bulbs do but once lit they use a lot less. So I put the cutout down to the startup pulling the voltage to low for the ecu to charge the capacitors for the injector firing. __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

9th November 2016, 20:31	#4
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Unusual fault with a diesel. ( It is a TD as your profile says CD ?? ) Try your battery connections to make sure they are clean and you have a good contact. Also the battery earth to the engine. About the only thing that would stop a diesel engine is a sudden loss of current to the ECU. Putting on the lights with a poor connection somewhere could do this.

9th November 2016, 21:08	#5
Jakg This is my second home N/A Join Date: Feb 2010 Location: Suffolk Posts: 6,867 Thanks: 0 Thanked 397 Times in 302 Posts	HIDs can do this, something to do with AC vs DC ballasts. I had some fitted in the main beam and my engine cut out when I put them on sometimes...