l322 fog light staying on

Hi looking for some help.Ive a 2002 l322 which has had the LED lights fitted from a later model with no apparent issues for a few years.Yesterday I notice the fog light on and I could get it to extinguish.Last night I took the fitting off completely thinking it wouldn't drain the battery if the light wasn't on but I've came home tonight and its flat as a pancake.Could it be the switch and how would I go about testing it,after I've recharged the battery of course or should I try an auto spark to save time ?

Do you have any diagnostic kit, I wouldn't start paying anybody without having a go myself?

First port of call is a new battery which is ordered ,I think the one that's in it has had it,not charging.Needle on the charger is swinging back and forth like a pendulam.Ive got a reader which I only use to clear a presure drop in the suspension reservoir now and again but I will check it out.I did have some water ingress down the a pillar due to a blocked sunroof drain,I wonder if waters got into the back of the switch ??

Drivers side foot well is a common water ingress point where the light control module is which can give all sorts of light issues.
Saintv8 knows a lot more than me when it comes to, well, rangerovers, landrovers in general and a lot of other stuff i probably dont even know i don't know.
Good battery is a must as you have probably found out from googling
A decent diagnostic kit like the allcomms is a must in my opinion if you are planning on keeping it.
Also if the lights are the later LED or after market then other wiring would have been added in to prevent the bulb warning so it my be worth checking behind the light clusters or in the boot

I've got a disco that water ingress has done my head in over the last year so I laid it aside and bought this rangie,previous owner spent over 20k including its purchase in 2013 on it.Im a mk2 escort kindamechanic,new points,plugs and cap is about as sophisticated as it gets.I luv the big bus but electronics are a nightmare when they fail.

I know what you mean, my other car is an unrestored Mk1 Escort.. The L322 is full of ECU's that don't follow the same rules as the old vehicles.
I would download a copy of Rave manual which is the most comprehensive manual you will ever read with an entire section dedicated to explaining every system in the L322 and another section explaining how to repair just about everything.
The download is here - http://www.landroverresource.com/
That would be my first step and secondly would be to get yourself some decent range rover specific diagnostics such as Allcomms (my favourite), faultmate ( best you can get but quite expensive) or the IID gap tool but have a read here - https://www.landyzone.co.uk/land-rover/diagnostic-tools.220357/

This is what you are dealing with which would be a nightmare to sort out using conventional methods which is why you need the dedicated diagnostics to interpret any faults for you and translate them into some sort of understandable format.
What is on your side is the L322 is very reliably unreliable so they tend to fail in mostly the same ways and around the same age or mileage so you won't be alone unless you start modifying them...

If I bought the best diagnostics unless it involves spanners and brute force,I would still be lost so my first port of call is my mate,an aa patrol man then forums because there's never an issue that someone else hasn't came across.I will fit the new battery and if the fog light is still on,which it probably will,phone a local specialist for a chat/quote.

They are not bad to work on and most of the work is hammers and spanners and the electronics are just a case of getting a fault code and changing out the offending item or the diagnostic kit may clear the fault for you and you will be away.It's your call of course but they are prone to many faults and unless you have a good sized budget, relying on indys to repair for you can very quickly drain your finances and make them uneconomical to keep. The AA patrol vehicles have some very tidy diagnostic kit so you are lucky to have one to hand.
Good luck and keep us posted

I blame landrover/bmw lol.Designing a product with so many electronic systems that have issues.when they work they are amazing but why don't they work for their expected life then just die when their time is out.

As HC says above, it is more than likely your Lighting Control Module.

This is mounted on the A pillar drivers side, tucked half way up under the side of the dash......if this has got wet, they could be corroded connections causing spurious faults.

All the switch does is send a pulse to the LCM to tell it to turn the lamps on and off.

If you are going to change the battery then follow the set proceedure to the letter, Saint or HC will give details I'm sure.

eddiecos said:

I blame landrover/bmw lol.Designing a product with so many electronic systems that have issues.when they work they are amazing but why don't they work for their expected life then just die when their time is out.

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I think the problem is that there is a lot of very sensitive electronic equipment in a vehicle that becomes cheap enough for the likes of me to afford to buy but not afford to send back to landrover to maintain. I'm sure if all our vehicles had full main dealer / specialist service history they would all be running around fault free but with a repair bill equal to what they were new to buy. You get a lot of complicated car for £60K and if I had paid that much for a TV 12 years ago and it went wrong I still wouldn't be pulling it apart to see what I could fix.
If you don't mind getting your hands dirty they can be very easy to work on as fortunately there is an absolute mountain of information available from Landrover and the web and as I found out after 1 day ot ownership, this forum.
Even though there is a mass of electronics you won't be pulling them apart generally apart from cleaning up the results of water ingress or in my case coffee spillage from a previous owner, but diagnostics will generally tell where the problem is and what to change out and again something like the Allcomms has been designed and built by an IT genius who owned an L322.
I look at my 04 4.4 as a massive puzzle that will find new and inventive ways to challenge my brain, patience, wallet, sanity .. I think you get the point, if you want a boring reliable off road truck that won't bring you to the brink of suicude then a Toyota Land Cruiser is the truck for you.

This forum gives me faith lol.I plugged the icarsoft I 930 in and it said rear right fog light defective so I swapped the left hand fitting on but its still lighting up the led on that.Got a charge in the battery overnight and I removed some trim to get a look at the lcm but I think I will give the quite local independent expert a phone in the morning to arrange a visit.Thanks for all your advice especially the battery removal.

eddiecos said:

This forum gives me faith lol.I plugged the icarsoft I 930 in and it said rear right fog light defective so I swapped the left hand fitting on but its still lighting up the led on that.Got a charge in the battery overnight and I removed some trim to get a look at the lcm but I think I will give the quite local independent expert a phone in the morning to arrange a visit.Thanks for all your advice especially the battery removal.

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Wait till you get our Paypal details to pay your bill.

Or you could just support Alan by purchasing his merchandise
Amazon product

holidaychicken said:

Or you could just support Alan by purchasing his merchandise
Amazon product

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Don't prod the sleeping bear.

And i'll leave it there, for now

They have advised me to change the lcm so a second had ones been ordered and if I've got any issues with it then I've to drop over and they will reprogram it.Just hope its a simple plug and play lol.Im tempted to open mine up and see if I can see obvious corrosion on any board.My disco had the 3 amigos on the dash all caused by water in the fuse box and cleaning the circuit board solved that.

The LCM contains vehicle specific information...i.e. Mileage and etc....plugging a different LCM in will cause the instrument pack to show the 'Tamper' indication (Small dot on the mileage display).....this is resolved once the original LCM is plugged back in again and the vehicle has not increased in mileage.

The proper process is to read the current LCM info....plug in the new LCM and upload the original LCMs info on to it!

For a trial it is OK, but for a permenant solution, they will need to read the LCM info then write this to the new one.

Looks like I will still have to pay a visit then.