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BMG

Member Since: 26 Feb 2019
Location: Kent
Posts: 196

2002 Range Rover Vogue 4.4 V8 Bonatti Grey

Rear number plate light constant warning

I've got a couple of codes under the 'instruments' section of the iCarsoft reader for this, but no idea what they mean. Everything else seems to work fine and I changed the LED bulbs out for 2 others, then back to the original type with no difference and clearing the codes makes no difference
What ECU would be controlling this ? 2002 4.4BMW FF.
Thanks

2nd Feb 2021 2:02pm

Joe90

Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6406

Do your LED bulbs have resistors fitted to behave like normal bulbs? otherwise this error will be thrown when the car does its cold/hot checks. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

2nd Feb 2021 2:28pm

bigbo

Member Since: 07 Jul 2014
Location: Derbyshire
Posts: 558

2006 Range Rover Supercharged 4.2 SC V8 Buckingham Blue

This is from the Electrical Library document

I hope it gives you a start

Light Check Module
The LCM (C2040) is located at the base of the RH 'A' post, and monitors the condition of the
fascia mounted rotary lighting switch (C0041) by providing a feed on an NB wire. The LCM
can determine the position of the switch by sensing if a feed is returned on a Y (side lamps)
or a B (headlamps) wire. The LCM also monitors the condition of the column mounted main/
dipped beam switch (C1832) via a U wire.

Side Lamps
If the LCM detects that side lamps have been selected, it provides a feed to the following:
To the RH side lamp (C0537) on an SU wire
To the LH side lamp (C0538) on an SG wire
To the RH tail lamp (C0125) on an SW wire
To the LH tail lamp (C0121) on an SP wire
The rear number plate lamp (C1495) on an SN and an SB wire
To the RH front side marker lamp (C0916) on an SU wire (NAS vehicles only)
To the RH rear side marker lamp (C0918) on an SU wire (NAS vehicles only)
To the LH front side marker lamp (C0917) on an SG wire (NAS vehicles only)
To the LH rear side marker lamp (C0919) on an SG wire (NAS vehicles only). Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

2nd Feb 2021 2:30pm

BMG

Member Since: 26 Feb 2019
Location: Kent
Posts: 196

Joe90 wrote:
Do your LED bulbs have resistors fitted to behave like normal bulbs? otherwise this error will be thrown when the car does its cold/hot checks.

They've been fine for a year or more. I thought this might be the problem , so swapped them out for another two , made no difference. Did the same for the stock type of bulb and no difference.
I did go through all the different sections with the code reader when I got it and didn't have any under instruments, so this is new.

I guess unrelated, but this came on after I got a punctured tyre and had the tailgate open for 10-15 mins as I changed the wheel.

2nd Feb 2021 2:41pm

BMG

Member Since: 26 Feb 2019
Location: Kent
Posts: 196

bigbo wrote:
This is from the Electrical Library document

I hope it gives you a start

Light Check Module
The LCM (C2040) is located at the base of the RH 'A' post, and monitors the condition of the
fascia mounted rotary lighting switch (C0041) by providing a feed on an NB wire. The LCM
can determine the position of the switch by sensing if a feed is returned on a Y (side lamps)
or a B (headlamps) wire. The LCM also monitors the condition of the column mounted main/
dipped beam switch (C1832) via a U wire.

Side Lamps
If the LCM detects that side lamps have been selected, it provides a feed to the following:
To the RH side lamp (C0537) on an SU wire
To the LH side lamp (C0538) on an SG wire
To the RH tail lamp (C0125) on an SW wire
To the LH tail lamp (C0121) on an SP wire
The rear number plate lamp (C1495) on an SN and an SB wire
To the RH front side marker lamp (C0916) on an SU wire (NAS vehicles only)
To the RH rear side marker lamp (C0918) on an SU wire (NAS vehicles only)
To the LH front side marker lamp (C0917) on an SG wire (NAS vehicles only)
To the LH rear side marker lamp (C0919) on an SG wire (NAS vehicles only).

Cheers. Will do a bit of digging and see if its something cheap on eBay I can try swapping.

2nd Feb 2021 2:46pm

nicedayforit

Member Since: 11 Jun 2011
Location: Beside the Solway
Posts: 3967

2004 Range Rover Vogue Td6 Giverny Green

Have you checked for corrosion in the bulb holders?

2nd Feb 2021 3:48pm

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