Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Interior lighting
Hi folks, not sure if this counts as a fault or fix but anyways, can someone shed some light on which bits of the car interior illuminate please? My gearlever selector doesn't light up (apart from the current gear) and the terrain response/suspension height buttons (again apart from the amber lights for the current selection) , nor do the clock, the start button or the headlamp switch. Everything else seems to. They haven't worked since I've had the car. I would have thought they should all glow green? Faulty components or something that can be switched on somewhere with a computer? Find it hard to believe that all the LEDs have failed...
[/i]Jaguar Land Rover: "Building great cars, badly."
28th Dec 2018 6:12 pm
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
OK so this seems to have everyone baffled, here's more info:
Bought a new headlight switch, still doesn't illuminate. Dismantled old headlight switch, tested all LEDs with multimeter, all LEDs are OK. Tested 12v supply to LEDs from connector in car, 0v. Tested all related fuses, tested the gaps where there are missing fuses, none have any power.
I would assume (from other cars I've driven) that the start/stop button should illuminate when the car is unlocked, and the headlight switch should illuminate when the ignition is on, so you can see it in the dark to turn your headlights on.
Can anyone shed any light on whether this illumination is something that can be switched on with diagnostic equipment?
It's due a service next month so I'll ask them again, although they were pretty clueless last time...Jaguar Land Rover: "Building great cars, badly."
19th Jan 2019 5:54 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8230
To the right of the steering column near the fog light switches there should be a rheostat switch to control the light intensity, I would be checking that for starters along with all fuses.It can when others can't,
It will when others won't,
It goes where others don't.
19th Jan 2019 6:34 pm
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Right, after much investigation and judicious use of Google, not to mention my multimeter, I still have no green illumination.
I have downloaded the wiring diagram and found the wire I need. It's red with a brown trace out of the FET on the BCM. Suspiciously, every component listed AFTER the FET doesn't illuminate. However, try as I might, I can only see the red/brown disappearing up the passenger (L/H) A-Pillar.
Can someone tell me exactly where this FET is located please, so I can check to see whether the thing has power and hopefully determine if the FET is faulty. Three years I've been trying to solve this on and off, and two specialists have looked at it!Jaguar Land Rover: "Building great cars, badly."
12th Oct 2019 2:05 pm
Green Land Rover
Member Since: 21 Oct 2017
Location: Stourbridge
Posts: 412
Some useful info here
https://disco4.com/forum/gear-selector-light-155578.htmlDiscovery 4 HSE - Aintree Green
Freelander 2 TD4 SE Automatic - Tonga Green
Defender XS - Tonga Green - Gone Now
Freelander 1 Td4 ES Manual - Epsom Green - Gone Now
Freelander 1 Td4 Kalahari SE - Epsom Green - Gone Now
Freelander 1 XEi - Epsom Green - Gone Now
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Thanks but no good, mines the earlier model, and it's not just one component, it's everything fed off the one module. What I want to know is where is the specific module, and is it replaceable, like the relays and fuses are?Jaguar Land Rover: "Building great cars, badly."
12th Oct 2019 4:35 pm
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Update:
Today I pulled the entire BCM out and located the red/brown feed on C586, the orange plug on the rear of the BCM. I have continuity from the terminal in the plug to every component I can test, so the harness is intact. However, I have zero voltage on the red/brown.
To clarify: I am only missing the green LED backlight illumination on the handbrake switch, cigar lighters, gear indicator, terrain response, analogue clock, start/stop switch and the headlight switch. Everything else on the console and steering wheel has the green backlight.
I assume like most cars, the headlight switch and the start/stop button should illuminate either on unlocking, or opening the doors. Given also that the start/stop switch, headlight switch, analogue clock, terrain response dial, gear indicators, cigar lighter illumination and the handbrake switch are all on the same feed, they should illuminate at the same time.
So I have one of three problems. Either:
1: Whatever triggers the illumination isn't working, despite my interior lights, footwell lights and puddle lights all coming on when I unlock the car.
2: The transistor or some other component on the PCB that powers the red/brown has failed (I find this unlikely)
3: The car is too clever for its own good and it hasn't been told to switch on the backlight.
Can anyone with knowledge of the CCF tell me if its possible that stuff like this can be turned on/off with the right diagnostic equipment?
Also is it possible that the BCM has been replaced in the past and incorrectly programmed, coded or otherwise cocked about with?
This fault/niggle has bugged me for three years and I feel like I'm actually close to fixing it.
Cheers!Jaguar Land Rover: "Building great cars, badly."
1st Nov 2019 5:10 pm
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
For info, my start button is backlit Orange but the rest is green.
I can’t see any CCF edits to control interior lighting other than the ambient lighting but I think that’s more to do with the door lighting etc.
I don’t know why LR would have different feeds for the interior lighting, could you connect the working system to the non working system as a fix?012MY RRS 5.0 Supercharged Autobiography (Current)
Mods:
TPMS (Complete but got an issue)
Genuine LR DRLs (Complete)
Remote Boot close from key fob (Complete)
2016 Discovery 4 Mirrors AKA RRS2 (Complete)
2014 L405 Surround Camera retro fit (Now 2016 L319)
2013 RRS Dual View Screen fit (Complete)
2016 LR4 RSE (Complete)
2014 LR4 Homelink (Complete)
2016 FFRR Electrochromatic Wing Mirror Glass (Complete)
3rd Nov 2019 9:04 am
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Hi M3Bobby, thanks for your reply. I didn't know the starter button was orange but thanks! It doesn't really matter as the back lights are all off the same feed.
I did wonder about jumping a feed from the centre console back lights, but I worry about damaging sensitive LR electronics 😂
The only other thing is the centre console only illuminates when the headlights are on.
I guess it's entirely possible that the transistor that feeds them off the BCM is goosed, but I'd be surprised. Seems like a really unlikely thing to fail. I've googled the fault and I can't find anyone with the same issue. I'll speak to my Indy in the week and see if they can help. As I said above, I assume the starter button should illuminate as soon as either the car unlocks or the door opens. So maybe the trigger isn't working. Can't see anything like that on the wiring diagrams though.
🤯
Cheers
P. S. How difficult is it to code a new BCM?Jaguar Land Rover: "Building great cars, badly."
well .... you've answered one of my questions about infernal lighting :
Click image to enlarge
Hazard warning switch is meant to light up. .... now I know, I'll have to fix it..
Dean
====================================
2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
3rd Nov 2019 10:27 am
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Well I'm happy to help 🤣
The wiring diagram only shows the canbus and an earth to the hazard switch though so might be a dodgy switch? Not sure I'd want to get stuck into the canbus, it's giving me a headache with the regular wiring 😂
If anyone can tell me what voltage they have on the red/brown feed to the back lights I'd be enormously grateful 👍
Cheers
SteveJaguar Land Rover: "Building great cars, badly."
3rd Nov 2019 1:30 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14138
Hi
May be just clutching at straws but are the earths points ok
Had a look through where earth connectors are and see one that it at the bottom of ur B pillar
Was just an idea
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3rd Nov 2019 2:11 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14138
Also on the other side there are Earth points
Click image to enlarge
Last edited by gstuart on 3rd Nov 2019 2:19 pm. Edited 3 times in total
3rd Nov 2019 2:18 pm
DiscoStevey
Member Since: 07 Jan 2017
Location: Cheshire
Posts: 61
Thanks for that, I'll check. I imagine if the earth was bad I'd still get voltage from the supply plug to another earth though?
Still, another place to look. I've convinced myself it's something simple. One of my surround cameras wasn't working when I bought the car. I assumed the camera was duff until I thought to check the connectors under the passenger seat and one was floating around loose 😂Jaguar Land Rover: "Building great cars, badly."
3rd Nov 2019 2:18 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14138
Hi
Hope it helps , see the earths are on a block of 3 x from what I can see
At least with a multimeter can easily check the earths using a continuity test at the B posts
Nothing like tearing ur hair out when trying to trace electrical faults and it seems just a break / bad connection , can cause all sorts of issues further down the line
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.... now I know, I'll have to fix it.
... All LED interiors lights, DRLs, Spare Wheel protector.
when trying to trace electrical faults and it seems just a break / bad connection , can cause all sorts of issues further down the line
