Headlights come on by themselves

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Headlights come on by themselves

Postby Faeview » Sat 13.07.2013, 11:45

I have a 1990 N/A that I am currently restoring. When the battery is connected the headlights randomly turn on. Any suggestions?
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Re: Headlights come on by themselves

Postby hatters » Sat 13.07.2013, 13:17

What happens when you operate the switch anything or nothing
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Re: Headlights come on by themselves

Postby Faeview » Sat 13.07.2013, 13:33

I have not tried turning the switch on then off again. I simply disconnect the battery.
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Re: Headlights come on by themselves

Postby hatters » Sat 13.07.2013, 13:50

When they come on check the front of the lights to see if you have main beam or dip ,one or two lights on if it's main beam it could be something to do with the stalk switch being faulty
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Re: Headlights come on by themselves

Postby Faeview » Sat 13.07.2013, 23:09

Thanks. It's the main beam. I will check the stalk
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Re: Headlights come on by themselves

Postby Brit-Car-Nut » Sat 13.07.2013, 23:24

There is a headlamp control module as well as a POD delay module. If you flash the hi-beams, the pod delay module pops them up and keeps them open for a short time before they close. The headlamp control module is activated by the headlamp switch and opens the headlamps for either the hi or low beam usage. Check to see if the directional stalk is stuck in the "flash" position. You can also unplug the directional switch from the main harness and see if the problem goes away. If it does, the switch is damaged but might just need to have the contacts for the headlight flash cleaned and/or adjusted.
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Re: Headlights come on by themselves

Postby Faeview » Tue 25.02.2014, 04:59

Well, back in July 2013 I changed the stalk and, thank you guys, it worked. No mysterious headlight opening/flashing...that was until Saturday. It has started again, this time low beam, both pod up, only the passenger side light working. Should I s=imply replace the main switch and delay pod or could there be a electrical short somewhere? :banghead:
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Re: Headlights come on by themselves

Postby Brit-Car-Nut » Tue 25.02.2014, 05:24

Why not un-plug the stalk and drive the car to see if it still happens. The headlamp pod lift module has the ability to do things on it's own and is known to have internal corrosion issues. When you actually turn on your headlights, do the low beams work on BOTH sides? How about high beams?

Here is the wiring diagram:
You can download a larger version at:
Also, the grounds/earths diagram is here:
Last edited by Brit-Car-Nut on Sat 08.09.2018, 12:56, edited 1 time in total.
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Re: Headlights come on by themselves

Postby Faeview » Fri 28.02.2014, 11:13

Thank you for the advice. The car has been in storage for over 7 years and as a result I have found a lot of corrosion and electrical faults.
When I run the car the lights did not come on by themselves. They work properly when turned on and off, so assume it is the delay pod that needs replacing as does the hazard light switch to get the indicators working.
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Re: Headlights come on by themselves

Postby Brit-Car-Nut » Fri 28.02.2014, 15:03

The hazard switch is a bugger to get apart and back together (to clean it).

Maybe consider this: http://www.ebay.co.uk/itm/Vauxhall-Cava ... 1336733887 ?

At £14.99, It is a decent buy. You will probably have to contact him to convince him to ship to Aussie land, but it is worth a try. I am in the US but have a friend in the UK I can send all of my eBay items to and he sends me a "care package" every few months.

The delay pod is part number B100M0110F which is on the Lotus Aftersales list for £15.43. Robert Chapmen at Stratton Motors in the UK can order it for you and is willing to ship internationally. You can also book your own shipping with Parcel2go or Interparcel via the Internet. Send me a PM if you want more info.
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Re: Headlights come on by themselves

Postby Enright » Thu 03.04.2014, 22:27

Faeview, did you get to the bottom of this?

I walked outside this morning and my headlamp pods were stuck up, but there were no lights on.
When I tried to unlock the car virtually everything was dead.
It seems as though it switched its own lights on in the night, and then proceeded to flatten its battery. :shock:

My bloody car effectively committed suicide - WTF!!! :banghead:

On getting home this evening I connected a booster pack and bump started it. After it had been running for a while the pods suddenly dropped on their own.
After that they operated perfectly - for a while.
So I attached my charger with the battery still connected, and a little while later (while I was chatting to a neighbour) the pods suddenly raised again on their own with dip beam lit.
This time they wouldn't go back down.
Switching the light switch back and forth would operate side lights, interior lights, rear and foglights all as usual, and pulling the stalk would flash main beam.
But no matter what I did, the pods stayed up and the outer lamps stayed lit. Until I pulled the +ve wires off the back of them.
I've tried disconnecting the headlamp module and putting the old one back on, even though I know it only controls the passenger side. It had no effect whatsoever.
I'm a bit baffled as to what would suddenly want to raise the pods and switch only the front outer lights on. :?

Edit: Got it!
After a bit of studying of the electrical manual, I went out and pulled the dip beam relay - it clicked off. It wasn't supposed to be on in the first place! And it was warm, so something must be keeping it energised.
Then I pulled the red pod delay module. It didn't do anything. But rather than pulling it apart and risking breaking it I gave it a bit of a tap and a shake and plugged it back in.
Now when I operated the stalk to flash the lights, I could feel the dip beam relay clicking on and off, which was progress.
Still no movement from the pods though, so I thought I'd try disconnecting and reconnecting the pod lift module. When I did this, there was another click.
Time to try plugging the lights back in to see if they were on or off. As soon as I touched a wire on the back of one of them, the motor sprang into life (almost trapping my hand under the pod)!
So I plugged the other one back in, operated the lights again, and everything was tickety-boo! :-D

I'm still baffled as to why the pod delay module would suddenly glitch like that and lock everything out, and I should count my blessings that it didn't permanently fry something (like the lift module). But at least it's working properly again for now. I'll be sure to check it first thing in the morning though!
Striking fear into the hearts of duplicate posts everywhere...! :P

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Re: Headlights come on by themselves

Postby Enright » Fri 04.04.2014, 08:53

PANTS! :evil:

You can take it from that exclamation that the problem was NOT fixed when I went out to the car first thing this morning.
Pods up and a dim light coming out of each one. :roll:

For the moment I've just pulled the dip beam relay and the delay module.
Will try swapping other parts later - at least with having 2 it's an option that's available to me, rather than simply throwing money at it by replacing potentially good bits.
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Re: Headlights come on by themselves

Postby Fetnas » Fri 04.04.2014, 23:57

Hi Faeview,

If you would like some help with elan issues, I'm not too far from you in Clifton Hill. I can't say that I know the cars as well as many of the UK guys, but I have done a decent amount of work on my 1990 SE and sometimes a fresh pair of eyes can help to find spot a problem.

Regarding the head light problem, it sounds like one of the modules has a faulty component inside or some moisture has found it's way inside to cause some mischief. The don't look very complicated, a bit of time with a soldering iron and a multi meter could be all that's needed.
Knowledge is realizing that the street is one-way, wisdom is looking both directions anyway
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Re: Headlights come on by themselves

Postby Enright » Sat 05.04.2014, 09:01

Swapping the delay module with the one from my other car seemed to sort it.
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Re: Headlights come on by themselves

Postby andy b » Sun 06.04.2014, 15:33

When my alternator failed (over voltage) it burnt out a component in the head lamp unit on the bulk head r/hand side we took it apart and found the faulty switch inside and replaced it changed the alternator and all was fine. When it failed the head lamps came up and would not go down. andy b
If you can't fix it with a hammer it's electrical.
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Re: Headlights come on by themselves

Postby texas2201 » Fri 11.04.2014, 09:12

I had this problem and replaced the relay - I got a replacement from Maplins I believe
http://www.extremepetrolhead.blogspot.com/

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Re: Headlights come on by themselves

Postby Faeview » Mon 05.05.2014, 12:24

Fetnas,
Thank you for the offer. I have had my M100 for 12 months and have slowly being fixing 7 years of storage corrosion.
I have bought a new relay as it seems to be the key to these mysterious lights. If it doesn't do the trick I would appreciate you assistance and advice.
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Re: Headlights come on by themselves

Postby Faeview » Thu 12.02.2015, 10:54

After removing the dash (not a pleasant experience, particularly putting it back!) and replacing the light relay, the emergency and the light switch, all is good. At the end of the day I believe the problem was the emergency flasher switch. Thank you to everyone for their help and suggestions.
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Re: Headlights come on by themselves

Postby Rambo » Sat 08.09.2018, 11:11

Brit-Car-Nut wrote:Why not un-plug the stalk and drive the car to see if it still happens. The headlamp pod lift module has the ability to do things on it's own and is known to have internal corrosion issues. When you actually turn on your headlights, do the low beams work on BOTH sides? How about high beams?

Here is the wiring diagram:
You can download a larger version at [deleted by Mod]

Also, the grounds/earths diagram is here: [deleted by Mod]


:porn: WARNING - the above links seem to lead you to porno sites rather to any wiring diagrams !! :porn:

I was looking for another LEC member (pun intended) for info on the grounding points for the headlights. Honest :shock: :shock: :shock:

You might want to remove the links John ?
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Re: Headlights come on by themselves

Postby dapinky » Sat 08.09.2018, 13:45

I see that John quickly reacted to the re-direct issue and deleted the links from his own post - however, he had no access to Marks account to delete the links from the quoted text, so brought it to our attention.

I have edited Marks post accordingly, and wish to thank both parties for dealing with this unfortunate matter appropriately.
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